diff --git a/packages/redux-devtools-inspector/.babelrc b/packages/redux-devtools-inspector/.babelrc
index 530ac9c9..e073a7e7 100644
--- a/packages/redux-devtools-inspector/.babelrc
+++ b/packages/redux-devtools-inspector/.babelrc
@@ -1,9 +1,10 @@
 {
-  "presets": ["@babel/preset-env", "@babel/preset-react"],
+  "presets": [
+    "@babel/env",
+    "@babel/react",
+    "@babel/typescript"
+  ],
   "plugins": [
-    "@babel/plugin-transform-runtime",
-    "@babel/plugin-proposal-class-properties",
-    "@babel/plugin-proposal-export-default-from",
-    "@babel/plugin-proposal-do-expressions"
+    "@babel/proposal-class-properties"
   ]
 }
diff --git a/packages/redux-devtools-inspector/.eslintignore b/packages/redux-devtools-inspector/.eslintignore
new file mode 100644
index 00000000..b1e0862f
--- /dev/null
+++ b/packages/redux-devtools-inspector/.eslintignore
@@ -0,0 +1,2 @@
+lib
+demo
diff --git a/packages/redux-devtools-inspector/.eslintrc.js b/packages/redux-devtools-inspector/.eslintrc.js
new file mode 100644
index 00000000..1eb24d2a
--- /dev/null
+++ b/packages/redux-devtools-inspector/.eslintrc.js
@@ -0,0 +1,13 @@
+module.exports = {
+  extends: '../../.eslintrc',
+  overrides: [
+    {
+      files: ['*.ts', '*.tsx'],
+      extends: '../../eslintrc.ts.react.base.json',
+      parserOptions: {
+        tsconfigRootDir: __dirname,
+        project: ['./tsconfig.json']
+      }
+    }
+  ]
+};
diff --git a/packages/redux-devtools-inspector/.npmignore b/packages/redux-devtools-inspector/.npmignore
deleted file mode 100644
index 7e7ce1e8..00000000
--- a/packages/redux-devtools-inspector/.npmignore
+++ /dev/null
@@ -1,8 +0,0 @@
-static
-src
-demo
-.*
-webpack.config.js
-index.html
-*.gif
-*.png
diff --git a/packages/redux-devtools-inspector/.prettierignore b/packages/redux-devtools-inspector/.prettierignore
new file mode 100644
index 00000000..b1e0862f
--- /dev/null
+++ b/packages/redux-devtools-inspector/.prettierignore
@@ -0,0 +1,2 @@
+lib
+demo
diff --git a/packages/redux-devtools-inspector/package.json b/packages/redux-devtools-inspector/package.json
index f785a2e4..339beac5 100644
--- a/packages/redux-devtools-inspector/package.json
+++ b/packages/redux-devtools-inspector/package.json
@@ -3,19 +3,25 @@
   "version": "0.11.0",
   "description": "Redux DevTools Diff Monitor",
   "scripts": {
-    "build": "npm run build:lib",
-    "build:lib": "cross-env NODE_ENV=production babel src --out-dir lib",
+    "type-check": "tsc --noEmit",
+    "type-check:watch": "npm run type-check -- --watch",
+    "build": "npm run build:types && npm run build:js",
+    "build:types": "tsc --emitDeclarationOnly",
+    "build:js": "babel src --out-dir lib --extensions \".ts,.tsx\" --source-maps inline",
+    "lint": "eslint . --ext .js,.jsx,.ts,.tsx",
+    "lint:fix": "eslint . --ext .js,.jsx,.ts,.tsx --fix",
     "build:demo": "cross-env NODE_ENV=production webpack -p",
     "stats": "webpack --profile --json > stats.json",
     "start": "webpack-dev-server",
     "preversion": "npm run lint",
     "version": "npm run build:demo && git add -A .",
     "postversion": "git push",
-    "prepare": "npm run build:lib",
-    "prepublishOnly": "npm run build:lib",
+    "prepare": "npm run build",
+    "prepublishOnly": "npm run build",
     "gh": "git subtree push --prefix demo/dist origin gh-pages"
   },
   "main": "lib/index.js",
+  "types": "lib/index.d.ts",
   "repository": {
     "url": "https://github.com/reduxjs/redux-devtools"
   },
@@ -28,11 +34,17 @@
     "@babel/plugin-transform-runtime": "^7.2.0",
     "@babel/preset-env": "^7.3.1",
     "@babel/preset-react": "^7.0.0",
+    "@types/dateformat": "^3.0.1",
+    "@types/dragula": "^3.7.0",
+    "@types/hex-rgba": "^1.0.0",
+    "@typescript-eslint/eslint-plugin": "^2.31.0",
+    "@typescript-eslint/parser": "^2.31.0",
     "babel-loader": "^8.0.5",
     "base16": "^1.0.0",
     "chokidar": "^1.6.1",
     "clean-webpack-plugin": "^1.0.0",
     "cross-env": "^5.2.0",
+    "csstype": "^2.6.10",
     "export-files-webpack-plugin": "0.0.1",
     "html-webpack-plugin": "^3.2.0",
     "lodash.shuffle": "^4.2.0",
@@ -50,13 +62,14 @@
     "redux-devtools": "^3.1.0",
     "redux-devtools-dock-monitor": "^1.0.1",
     "redux-logger": "^2.5.2",
+    "typescript": "^3.8.3",
     "webpack": "^4.27.1",
     "webpack-cli": "^3.2.0",
     "webpack-dev-server": "^3.1.14"
   },
   "peerDependencies": {
-    "react": ">=15.0.0",
-    "react-dom": ">=15.0.0"
+    "@types/react": "^16.3.0",
+    "react": "^16.3.0"
   },
   "author": "Alexander <alexkuz@gmail.com> (http://kuzya.org/)",
   "contributors": [
@@ -64,6 +77,7 @@
   ],
   "license": "MIT",
   "dependencies": {
+    "@types/prop-types": "^15.6.2",
     "babel-runtime": "^6.3.19",
     "dateformat": "^1.0.12",
     "hex-rgba": "^1.0.0",
diff --git a/packages/redux-devtools-inspector/src/.noderequirer.json b/packages/redux-devtools-inspector/src/.noderequirer.json
deleted file mode 100644
index 20e76308..00000000
--- a/packages/redux-devtools-inspector/src/.noderequirer.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "import": true
-}
diff --git a/packages/redux-devtools-inspector/src/ActionList.jsx b/packages/redux-devtools-inspector/src/ActionList.tsx
similarity index 61%
rename from packages/redux-devtools-inspector/src/ActionList.jsx
rename to packages/redux-devtools-inspector/src/ActionList.tsx
index 66ce8a3b..e6317078 100644
--- a/packages/redux-devtools-inspector/src/ActionList.jsx
+++ b/packages/redux-devtools-inspector/src/ActionList.tsx
@@ -1,10 +1,18 @@
-import React, { Component } from 'react';
+import React, { Component, RefCallback } from 'react';
 import dragula from 'react-dragula';
 import ActionListRow from './ActionListRow';
 import ActionListHeader from './ActionListHeader';
 import shouldPureComponentUpdate from 'react-pure-render/function';
+import { Action } from 'redux';
+import { PerformAction } from 'redux-devtools';
+import { StylingFunction } from 'react-base16-styling';
+import { Drake } from 'dragula';
 
-function getTimestamps(actions, actionIds, actionId) {
+function getTimestamps<A extends Action<unknown>>(
+  actions: { [actionId: number]: PerformAction<A> },
+  actionIds: number[],
+  actionId: number
+) {
   const idx = actionIds.indexOf(actionId);
   const prevActionId = actionIds[idx - 1];
 
@@ -14,10 +22,40 @@ function getTimestamps(actions, actionIds, actionId) {
   };
 }
 
-export default class ActionList extends Component {
+interface Props<S, A extends Action<unknown>> {
+  actions: { [actionId: number]: PerformAction<A> };
+  actionIds: number[];
+  isWideLayout: boolean;
+  searchValue: string | undefined;
+  selectedActionId: number | null;
+  startActionId: number | null;
+  skippedActionIds: number[];
+  draggableActions: boolean;
+  hideMainButtons: boolean | undefined;
+  hideActionButtons: boolean | undefined;
+  styling: StylingFunction;
+
+  onSelect: (event: React.MouseEvent<HTMLDivElement>, actionId: number) => void;
+  onSearch: (value: string) => void;
+  onToggleAction: (actionId: number) => void;
+  onJumpToState: (actionId: number) => void;
+  onCommit: () => void;
+  onSweep: () => void;
+  onReorderAction: (actionId: number, beforeActionId: number) => void;
+  currentActionId: number;
+  lastActionId: number;
+}
+
+export default class ActionList<S, A extends Action<unknown>> extends Component<
+  Props<S, A>
+> {
   shouldComponentUpdate = shouldPureComponentUpdate;
 
-  componentWillReceiveProps(nextProps) {
+  node?: HTMLDivElement | null;
+  scrollDown?: boolean;
+  drake?: Drake;
+
+  componentWillReceiveProps(nextProps: Props<S, A>) {
     const node = this.node;
     if (!node) {
       this.scrollDown = true;
@@ -35,22 +73,22 @@ export default class ActionList extends Component {
     this.scrollToBottom();
 
     if (!this.props.draggableActions) return;
-    const container = this.node;
+    const container = this.node!;
     this.drake = dragula([container], {
       copy: false,
       copySortSource: false,
       mirrorContainer: container,
       accepts: (el, target, source, sibling) =>
-        !sibling || parseInt(sibling.getAttribute('data-id')),
+        !sibling || !!parseInt(sibling.getAttribute('data-id')!),
       moves: (el, source, handle) =>
-        parseInt(el.getAttribute('data-id')) &&
-        handle.className.indexOf('selectorButton') !== 0
+        !!parseInt(el!.getAttribute('data-id')!) &&
+        !handle!.className.startsWith('selectorButton')
     }).on('drop', (el, target, source, sibling) => {
       let beforeActionId = this.props.actionIds.length;
-      if (sibling && sibling.className.indexOf('gu-mirror') === -1) {
-        beforeActionId = parseInt(sibling.getAttribute('data-id'));
+      if (sibling && !sibling.className.includes('gu-mirror')) {
+        beforeActionId = parseInt(sibling.getAttribute('data-id')!);
       }
-      const actionId = parseInt(el.getAttribute('data-id'));
+      const actionId = parseInt(el.getAttribute('data-id')!);
       this.props.onReorderAction(actionId, beforeActionId);
     });
   }
@@ -69,7 +107,7 @@ export default class ActionList extends Component {
     }
   }
 
-  getRef = node => {
+  getRef: RefCallback<HTMLDivElement> = node => {
     this.node = node;
   };
 
@@ -95,10 +133,10 @@ export default class ActionList extends Component {
     } = this.props;
     const lowerSearchValue = searchValue && searchValue.toLowerCase();
     const filteredActionIds = searchValue
-      ? actionIds.filter(
-          id =>
-            actions[id].action.type.toLowerCase().indexOf(lowerSearchValue) !==
-            -1
+      ? actionIds.filter(id =>
+          (actions[id].action.type as string)
+            .toLowerCase()
+            .includes(lowerSearchValue as string)
         )
       : actionIds;
 
@@ -129,20 +167,22 @@ export default class ActionList extends Component {
               isSelected={
                 (startActionId !== null &&
                   actionId >= startActionId &&
-                  actionId <= selectedActionId) ||
+                  actionId <= (selectedActionId as number)) ||
                 actionId === selectedActionId
               }
               isInFuture={
                 actionIds.indexOf(actionId) > actionIds.indexOf(currentActionId)
               }
-              onSelect={e => onSelect(e, actionId)}
+              onSelect={(e: React.MouseEvent<HTMLDivElement>) =>
+                onSelect(e, actionId)
+              }
               timestamps={getTimestamps(actions, actionIds, actionId)}
               action={actions[actionId].action}
               onToggleClick={() => onToggleAction(actionId)}
               onJumpClick={() => onJumpToState(actionId)}
-              onCommitClick={() => onCommit(actionId)}
+              onCommitClick={() => onCommit()}
               hideActionButtons={hideActionButtons}
-              isSkipped={skippedActionIds.indexOf(actionId) !== -1}
+              isSkipped={skippedActionIds.includes(actionId)}
             />
           ))}
         </div>
diff --git a/packages/redux-devtools-inspector/src/ActionListHeader.jsx b/packages/redux-devtools-inspector/src/ActionListHeader.tsx
similarity index 57%
rename from packages/redux-devtools-inspector/src/ActionListHeader.jsx
rename to packages/redux-devtools-inspector/src/ActionListHeader.tsx
index eb086f37..8ac97037 100644
--- a/packages/redux-devtools-inspector/src/ActionListHeader.jsx
+++ b/packages/redux-devtools-inspector/src/ActionListHeader.tsx
@@ -1,10 +1,25 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 import RightSlider from './RightSlider';
+import { StylingFunction } from 'react-base16-styling';
 
-const getActiveButtons = hasSkippedActions =>
-  [hasSkippedActions && 'Sweep', 'Commit'].filter(a => a);
+const getActiveButtons = (hasSkippedActions: boolean): ('Sweep' | 'Commit')[] =>
+  [hasSkippedActions && 'Sweep', 'Commit'].filter(a => a) as (
+    | 'Sweep'
+    | 'Commit'
+  )[];
 
-const ActionListHeader = ({
+interface Props {
+  styling: StylingFunction;
+  onSearch: (value: string) => void;
+  hasSkippedActions: boolean;
+  hasStagedActions: boolean;
+  onCommit: () => void;
+  onSweep: () => void;
+  hideMainButtons: boolean | undefined;
+}
+
+const ActionListHeader: React.FunctionComponent<Props> = ({
   styling,
   onSearch,
   hasSkippedActions,
@@ -48,4 +63,14 @@ const ActionListHeader = ({
   </div>
 );
 
+ActionListHeader.propTypes = {
+  styling: PropTypes.func.isRequired,
+  onSearch: PropTypes.func.isRequired,
+  hasSkippedActions: PropTypes.bool.isRequired,
+  hasStagedActions: PropTypes.bool.isRequired,
+  onCommit: PropTypes.func.isRequired,
+  onSweep: PropTypes.func.isRequired,
+  hideMainButtons: PropTypes.bool
+};
+
 export default ActionListHeader;
diff --git a/packages/redux-devtools-inspector/src/ActionListRow.jsx b/packages/redux-devtools-inspector/src/ActionListRow.tsx
similarity index 71%
rename from packages/redux-devtools-inspector/src/ActionListRow.jsx
rename to packages/redux-devtools-inspector/src/ActionListRow.tsx
index 838ca567..0e6639b0 100644
--- a/packages/redux-devtools-inspector/src/ActionListRow.jsx
+++ b/packages/redux-devtools-inspector/src/ActionListRow.tsx
@@ -1,14 +1,41 @@
 import React, { Component } from 'react';
-import { PropTypes } from 'prop-types';
+import PropTypes from 'prop-types';
 import shouldPureComponentUpdate from 'react-pure-render/function';
 import dateformat from 'dateformat';
 import debounce from 'lodash.debounce';
 import RightSlider from './RightSlider';
+import { StylingFunction } from 'react-base16-styling';
+import { Action } from 'redux';
 
 const BUTTON_SKIP = 'Skip';
 const BUTTON_JUMP = 'Jump';
 
-export default class ActionListRow extends Component {
+type Button = typeof BUTTON_SKIP | typeof BUTTON_JUMP;
+
+interface Props<A extends Action<unknown>> {
+  styling: StylingFunction;
+  isSelected: boolean;
+  action: A;
+  actionId: number;
+  isInitAction: boolean;
+  onSelect: React.MouseEventHandler<HTMLDivElement> | undefined;
+  timestamps: { current: number; previous: number };
+  isSkipped: boolean;
+  isInFuture: boolean;
+  hideActionButtons: boolean | undefined;
+  onToggleClick: () => void;
+  onJumpClick: () => void;
+  onCommitClick: () => void;
+}
+
+interface State {
+  hover: boolean;
+}
+
+export default class ActionListRow<A extends Action<unknown>> extends Component<
+  Props<A>,
+  State
+> {
   state = { hover: false };
 
   static propTypes = {
@@ -44,18 +71,24 @@ export default class ActionListRow extends Component {
     const timeDelta = timestamps.current - timestamps.previous;
     const showButtons = (hover && !isInitAction) || isSkipped;
 
-    const isButtonSelected = btn => btn === BUTTON_SKIP && isSkipped;
+    const isButtonSelected = (btn: Button) => btn === BUTTON_SKIP && isSkipped;
 
     let actionType = action.type;
     if (typeof actionType === 'undefined') actionType = '<UNDEFINED>';
     else if (actionType === null) actionType = '<NULL>';
-    else actionType = actionType.toString() || '<EMPTY>';
+    else actionType = (actionType as string).toString() || '<EMPTY>';
 
     return (
       <div
         onClick={onSelect}
-        onMouseEnter={!hideActionButtons && this.handleMouseEnter}
-        onMouseLeave={!hideActionButtons && this.handleMouseLeave}
+        onMouseEnter={
+          (!hideActionButtons &&
+            this.handleMouseEnter) as React.MouseEventHandler<HTMLDivElement>
+        }
+        onMouseLeave={
+          (!hideActionButtons &&
+            this.handleMouseLeave) as React.MouseEventHandler<HTMLDivElement>
+        }
         onMouseDown={this.handleMouseDown}
         onMouseUp={this.handleMouseEnter}
         data-id={actionId}
@@ -76,7 +109,7 @@ export default class ActionListRow extends Component {
             isSkipped && 'actionListItemNameSkipped'
           ])}
         >
-          {actionType}
+          {actionType as string}
         </div>
         {hideActionButtons ? (
           <RightSlider styling={styling} shown>
@@ -103,12 +136,12 @@ export default class ActionListRow extends Component {
             </RightSlider>
             <RightSlider styling={styling} shown={showButtons} rotate>
               <div {...styling('actionListItemSelector')}>
-                {[BUTTON_JUMP, BUTTON_SKIP].map(
+                {([BUTTON_JUMP, BUTTON_SKIP] as const).map(
                   btn =>
                     (!isInitAction || btn !== BUTTON_SKIP) && (
                       <div
                         key={btn}
-                        onClick={this.handleButtonClick.bind(this, btn)}
+                        onClick={e => this.handleButtonClick(btn, e)}
                         {...styling(
                           [
                             'selectorButton',
@@ -131,7 +164,7 @@ export default class ActionListRow extends Component {
     );
   }
 
-  handleButtonClick(btn, e) {
+  handleButtonClick = (btn: Button, e: React.MouseEvent<HTMLDivElement>) => {
     e.stopPropagation();
 
     switch (btn) {
@@ -142,10 +175,10 @@ export default class ActionListRow extends Component {
         this.props.onJumpClick();
         break;
     }
-  }
+  };
 
-  handleMouseEnter = e => {
-    if (this.hover) return;
+  handleMouseEnter = (e: React.MouseEvent<HTMLDivElement>) => {
+    if (this.state.hover) return;
     this.handleMouseLeave.cancel();
     this.handleMouseEnterDebounced(e.buttons);
   };
@@ -160,8 +193,13 @@ export default class ActionListRow extends Component {
     if (this.state.hover) this.setState({ hover: false });
   }, 100);
 
-  handleMouseDown = e => {
-    if (e.target.className.indexOf('selectorButton') === 0) return;
+  handleMouseDown = (e: React.MouseEvent<HTMLDivElement>) => {
+    if (
+      ((e.target as unknown) as { className: string[] }).className.indexOf(
+        'selectorButton'
+      ) === 0
+    )
+      return;
     this.handleMouseLeave();
   };
 }
diff --git a/packages/redux-devtools-inspector/src/ActionPreview.jsx b/packages/redux-devtools-inspector/src/ActionPreview.tsx
similarity index 52%
rename from packages/redux-devtools-inspector/src/ActionPreview.jsx
rename to packages/redux-devtools-inspector/src/ActionPreview.tsx
index 7a4e25f7..8d054f77 100644
--- a/packages/redux-devtools-inspector/src/ActionPreview.jsx
+++ b/packages/redux-devtools-inspector/src/ActionPreview.tsx
@@ -1,9 +1,41 @@
 import React, { Component } from 'react';
-import { DEFAULT_STATE } from './redux';
+import { DEFAULT_STATE, MonitorState } from './redux';
 import ActionPreviewHeader from './ActionPreviewHeader';
 import DiffTab from './tabs/DiffTab';
 import StateTab from './tabs/StateTab';
 import ActionTab from './tabs/ActionTab';
+import { Base16Theme, StylingFunction } from 'react-base16-styling';
+import { Delta } from 'jsondiffpatch';
+import { Action } from 'redux';
+import { PerformAction } from 'redux-devtools';
+
+export interface TabComponentProps<S, A extends Action<unknown>> {
+  labelRenderer: (
+    keyPath: (string | number)[],
+    nodeType: string,
+    expanded: boolean,
+    expandable: boolean
+  ) => React.ReactNode;
+  styling: StylingFunction;
+  computedStates: { state: S; error?: string }[];
+  actions: { [actionId: number]: PerformAction<A> };
+  selectedActionId: number | null;
+  startActionId: number | null;
+  base16Theme: Base16Theme;
+  invertTheme: boolean;
+  isWideLayout: boolean;
+  dataTypeKey: string | undefined;
+  delta: Delta | null | undefined | false;
+  action: A;
+  nextState: S;
+  monitorState: MonitorState;
+  updateMonitorState: (monitorState: Partial<MonitorState>) => void;
+}
+
+export interface Tab<S, A extends Action<unknown>> {
+  name: string;
+  component: React.ComponentType<TabComponentProps<S, A>>;
+}
 
 const DEFAULT_TABS = [
   {
@@ -20,7 +52,32 @@ const DEFAULT_TABS = [
   }
 ];
 
-class ActionPreview extends Component {
+interface Props<S, A extends Action<unknown>> {
+  styling: StylingFunction;
+  delta: Delta | null | undefined | false;
+  error: string | undefined;
+  nextState: S;
+  onInspectPath: (path: (string | number)[]) => void;
+  inspectedPath: (string | number)[];
+  tabName: string;
+  isWideLayout: boolean;
+  onSelectTab: (tabName: string) => void;
+  action: A;
+  actions: { [actionId: number]: PerformAction<A> };
+  selectedActionId: number | null;
+  startActionId: number | null;
+  computedStates: { state: S; error?: string }[];
+  base16Theme: Base16Theme;
+  invertTheme: boolean;
+  tabs: Tab<S, A>[] | ((tabs: Tab<S, A>[]) => Tab<S, A>[]);
+  dataTypeKey: string | undefined;
+  monitorState: MonitorState;
+  updateMonitorState: (monitorState: Partial<MonitorState>) => void;
+}
+
+class ActionPreview<S, A extends Action<unknown>> extends Component<
+  Props<S, A>
+> {
   static defaultProps = {
     tabName: DEFAULT_STATE.tabName
   };
@@ -49,21 +106,21 @@ class ActionPreview extends Component {
       updateMonitorState
     } = this.props;
 
-    const renderedTabs =
+    const renderedTabs: Tab<S, A>[] =
       typeof tabs === 'function'
-        ? tabs(DEFAULT_TABS)
+        ? tabs(DEFAULT_TABS as Tab<S, A>[])
         : tabs
         ? tabs
-        : DEFAULT_TABS;
+        : (DEFAULT_TABS as Tab<S, A>[]);
 
     const { component: TabComponent } =
-      renderedTabs.find(tab => tab.name === tabName) ||
-      renderedTabs.find(tab => tab.name === DEFAULT_STATE.tabName);
+      renderedTabs.find(tab => tab.name === tabName)! ||
+      renderedTabs.find(tab => tab.name === DEFAULT_STATE.tabName)!;
 
     return (
       <div key="actionPreview" {...styling('actionPreview')}>
         <ActionPreviewHeader
-          tabs={renderedTabs}
+          tabs={(renderedTabs as unknown) as Tab<unknown, Action<unknown>>[]}
           {...{ styling, inspectedPath, onInspectPath, tabName, onSelectTab }}
         />
         {!error && (
@@ -94,7 +151,11 @@ class ActionPreview extends Component {
     );
   }
 
-  labelRenderer = ([key, ...rest], nodeType, expanded) => {
+  labelRenderer = (
+    [key, ...rest]: (string | number)[],
+    nodeType: string,
+    expanded: boolean
+  ) => {
     const { styling, onInspectPath, inspectedPath } = this.props;
 
     return (
diff --git a/packages/redux-devtools-inspector/src/ActionPreviewHeader.jsx b/packages/redux-devtools-inspector/src/ActionPreviewHeader.tsx
similarity index 58%
rename from packages/redux-devtools-inspector/src/ActionPreviewHeader.jsx
rename to packages/redux-devtools-inspector/src/ActionPreviewHeader.tsx
index d6a87a4e..56fe8c46 100644
--- a/packages/redux-devtools-inspector/src/ActionPreviewHeader.jsx
+++ b/packages/redux-devtools-inspector/src/ActionPreviewHeader.tsx
@@ -1,16 +1,32 @@
 import React from 'react';
+import PropTypes from 'prop-types';
+import { StylingFunction } from 'react-base16-styling';
+import { Action } from 'redux';
+import { Tab } from './ActionPreview';
 
-const ActionPreviewHeader = ({
+interface Props<S, A extends Action<unknown>> {
+  styling: StylingFunction;
+  inspectedPath: (string | number)[];
+  onInspectPath: (path: (string | number)[]) => void;
+  tabName: string;
+  onSelectTab: (tabName: string) => void;
+  tabs: Tab<S, A>[];
+}
+
+const ActionPreviewHeader: React.FunctionComponent<Props<
+  unknown,
+  Action<unknown>
+>> = <S, A extends Action<unknown>>({
   styling,
   inspectedPath,
   onInspectPath,
   tabName,
   onSelectTab,
   tabs
-}) => (
+}: Props<S, A>) => (
   <div key="previewHeader" {...styling('previewHeader')}>
     <div {...styling('tabSelector')}>
-      {tabs.map(tab => (
+      {tabs.map((tab: Tab<S, A>) => (
         <div
           onClick={() => onSelectTab(tab.name)}
           key={tab.name}
@@ -39,7 +55,7 @@ const ActionPreviewHeader = ({
       ) : (
         tabName
       )}
-      {inspectedPath.map((key, idx) =>
+      {inspectedPath.map((key: string | number, idx: number) =>
         idx === inspectedPath.length - 1 ? (
           <span key={key}>{key}</span>
         ) : (
@@ -57,4 +73,13 @@ const ActionPreviewHeader = ({
   </div>
 );
 
+ActionPreviewHeader.propTypes = {
+  styling: PropTypes.func.isRequired,
+  inspectedPath: PropTypes.array.isRequired,
+  onInspectPath: PropTypes.func.isRequired,
+  tabName: PropTypes.string.isRequired,
+  onSelectTab: PropTypes.func.isRequired,
+  tabs: PropTypes.array.isRequired
+};
+
 export default ActionPreviewHeader;
diff --git a/packages/redux-devtools-inspector/src/DevtoolsInspector.js b/packages/redux-devtools-inspector/src/DevtoolsInspector.tsx
similarity index 74%
rename from packages/redux-devtools-inspector/src/DevtoolsInspector.js
rename to packages/redux-devtools-inspector/src/DevtoolsInspector.tsx
index 6f30a5ad..0c79d075 100644
--- a/packages/redux-devtools-inspector/src/DevtoolsInspector.js
+++ b/packages/redux-devtools-inspector/src/DevtoolsInspector.tsx
@@ -1,17 +1,29 @@
 import React, { Component } from 'react';
-import { PropTypes } from 'prop-types';
+import PropTypes from 'prop-types';
 import {
   createStylingFromTheme,
   base16Themes
 } from './utils/createStylingFromTheme';
 import shouldPureComponentUpdate from 'react-pure-render/function';
 import ActionList from './ActionList';
-import ActionPreview from './ActionPreview';
+import ActionPreview, { Tab } from './ActionPreview';
 import getInspectedState from './utils/getInspectedState';
 import createDiffPatcher from './createDiffPatcher';
-import { getBase16Theme } from 'react-base16-styling';
-import { reducer, updateMonitorState } from './redux';
-import { ActionCreators } from 'redux-devtools';
+import {
+  Base16Theme,
+  getBase16Theme,
+  StylingFunction,
+  Theme
+} from 'react-base16-styling';
+import {
+  MonitorAction,
+  MonitorState,
+  reducer,
+  updateMonitorState
+} from './redux';
+import { ActionCreators, LiftedAction, LiftedState } from 'redux-devtools';
+import { Action, Dispatch } from 'redux';
+import { Delta, DiffContext } from 'jsondiffpatch';
 
 const {
   commit,
@@ -22,21 +34,43 @@ const {
   reorderAction
 } = ActionCreators;
 
-function getLastActionId(props) {
+export interface Props<S, A extends Action<unknown>>
+  extends LiftedState<S, A, MonitorState> {
+  dispatch: Dispatch<
+    MonitorAction | LiftedAction<S, A, MonitorState, MonitorAction>
+  >;
+
+  select: (state: S) => unknown;
+  supportImmutable: boolean;
+  draggableActions: boolean;
+  tabs: Tab<S, A>[] | ((tabs: Tab<S, A>[]) => Tab<S, A>[]);
+  theme: Theme;
+  invertTheme: boolean;
+  diffObjectHash?: (item: any, index: number) => string;
+  diffPropertyFilter?: (name: string, context: DiffContext) => boolean;
+  dataTypeKey?: string;
+  hideMainButtons?: boolean;
+  hideActionButtons?: boolean;
+}
+
+function getLastActionId<S, A extends Action<unknown>>(props: Props<S, A>) {
   return props.stagedActionIds[props.stagedActionIds.length - 1];
 }
 
-function getCurrentActionId(props, monitorState) {
+function getCurrentActionId<S, A extends Action<unknown>>(
+  props: Props<S, A>,
+  monitorState: MonitorState
+) {
   return monitorState.selectedActionId === null
     ? props.stagedActionIds[props.currentStateIndex]
     : monitorState.selectedActionId;
 }
 
-function getFromState(
-  actionIndex,
-  stagedActionIds,
-  computedStates,
-  monitorState
+function getFromState<S>(
+  actionIndex: number,
+  stagedActionIds: number[],
+  computedStates: { state: S; error?: string }[],
+  monitorState: MonitorState
 ) {
   const { startActionId } = monitorState;
   if (startActionId === null) {
@@ -47,7 +81,10 @@ function getFromState(
   return computedStates[fromStateIdx];
 }
 
-function createIntermediateState(props, monitorState) {
+function createIntermediateState<S, A extends Action<unknown>>(
+  props: Props<S, A>,
+  monitorState: MonitorState
+) {
   const {
     supportImmutable,
     computedStates,
@@ -97,15 +134,27 @@ function createIntermediateState(props, monitorState) {
   };
 }
 
-function createThemeState(props) {
-  const base16Theme = getBase16Theme(props.theme, base16Themes);
+function createThemeState<S, A extends Action<unknown>>(props: Props<S, A>) {
+  const base16Theme = getBase16Theme(props.theme, base16Themes)!;
   const styling = createStylingFromTheme(props.theme, props.invertTheme);
 
   return { base16Theme, styling };
 }
 
-export default class DevtoolsInspector extends Component {
-  constructor(props) {
+interface State<S, A extends Action<unknown>> {
+  isWideLayout: boolean;
+  themeState: { base16Theme: Base16Theme; styling: StylingFunction };
+  delta: Delta | null | undefined | false;
+  nextState: S;
+  action: A;
+  error: string | undefined;
+}
+
+export default class DevtoolsInspector<
+  S,
+  A extends Action<unknown>
+> extends Component<Props<S, A>, State<S, A>> {
+  constructor(props: Props<S, A>) {
     super(props);
     this.state = {
       ...createIntermediateState(props, props.monitorState),
@@ -142,7 +191,7 @@ export default class DevtoolsInspector extends Component {
   static update = reducer;
 
   static defaultProps = {
-    select: state => state,
+    select: (state: unknown) => state,
     supportImmutable: false,
     draggableActions: true,
     theme: 'inspector',
@@ -151,29 +200,35 @@ export default class DevtoolsInspector extends Component {
 
   shouldComponentUpdate = shouldPureComponentUpdate;
 
+  updateSizeTimeout?: number;
+  inspectorRef?: HTMLDivElement | null;
+
   componentDidMount() {
     this.updateSizeMode();
-    this.updateSizeTimeout = setInterval(this.updateSizeMode.bind(this), 150);
+    this.updateSizeTimeout = window.setInterval(
+      this.updateSizeMode.bind(this),
+      150
+    );
   }
 
   componentWillUnmount() {
     clearTimeout(this.updateSizeTimeout);
   }
 
-  updateMonitorState = monitorState => {
+  updateMonitorState = (monitorState: Partial<MonitorState>) => {
     this.props.dispatch(updateMonitorState(monitorState));
   };
 
   updateSizeMode() {
-    const isWideLayout = this.inspectorRef.offsetWidth > 500;
+    const isWideLayout = this.inspectorRef!.offsetWidth > 500;
 
     if (isWideLayout !== this.state.isWideLayout) {
       this.setState({ isWideLayout });
     }
   }
 
-  componentWillReceiveProps(nextProps) {
-    let nextMonitorState = nextProps.monitorState;
+  componentWillReceiveProps(nextProps: Props<S, A>) {
+    const nextMonitorState = nextProps.monitorState;
     const monitorState = this.props.monitorState;
 
     if (
@@ -197,7 +252,7 @@ export default class DevtoolsInspector extends Component {
     }
   }
 
-  inspectorCreateRef = node => {
+  inspectorCreateRef: React.RefCallback<HTMLDivElement> = node => {
     this.inspectorRef = node;
   };
 
@@ -287,7 +342,9 @@ export default class DevtoolsInspector extends Component {
           monitorState={this.props.monitorState}
           updateMonitorState={this.updateMonitorState}
           styling={styling}
-          onInspectPath={this.handleInspectPath.bind(this, inspectedPathType)}
+          onInspectPath={keyPath =>
+            this.handleInspectPath(inspectedPathType, keyPath)
+          }
           inspectedPath={monitorState[inspectedPathType]}
           onSelectTab={this.handleSelectTab}
         />
@@ -295,11 +352,11 @@ export default class DevtoolsInspector extends Component {
     );
   }
 
-  handleToggleAction = actionId => {
+  handleToggleAction = (actionId: number) => {
     this.props.dispatch(toggleAction(actionId));
   };
 
-  handleJumpToState = actionId => {
+  handleJumpToState = (actionId: number) => {
     if (jumpToAction) {
       this.props.dispatch(jumpToAction(actionId));
     } else {
@@ -309,7 +366,7 @@ export default class DevtoolsInspector extends Component {
     }
   };
 
-  handleReorderAction = (actionId, beforeActionId) => {
+  handleReorderAction = (actionId: number, beforeActionId: number) => {
     if (reorderAction)
       this.props.dispatch(reorderAction(actionId, beforeActionId));
   };
@@ -322,11 +379,14 @@ export default class DevtoolsInspector extends Component {
     this.props.dispatch(sweep());
   };
 
-  handleSearch = val => {
+  handleSearch = (val: string) => {
     this.updateMonitorState({ searchValue: val });
   };
 
-  handleSelectAction = (e, actionId) => {
+  handleSelectAction = (
+    e: React.MouseEvent<HTMLDivElement>,
+    actionId: number
+  ) => {
     const { monitorState } = this.props;
     let startActionId;
     let selectedActionId;
@@ -365,11 +425,14 @@ export default class DevtoolsInspector extends Component {
     this.updateMonitorState({ startActionId, selectedActionId });
   };
 
-  handleInspectPath = (pathType, path) => {
+  handleInspectPath = (
+    pathType: 'inspectedActionPath' | 'inspectedStatePath',
+    path: (string | number)[]
+  ) => {
     this.updateMonitorState({ [pathType]: path });
   };
 
-  handleSelectTab = tabName => {
+  handleSelectTab = (tabName: string) => {
     this.updateMonitorState({ tabName });
   };
 }
diff --git a/packages/redux-devtools-inspector/src/RightSlider.jsx b/packages/redux-devtools-inspector/src/RightSlider.jsx
deleted file mode 100644
index 2b1ebd45..00000000
--- a/packages/redux-devtools-inspector/src/RightSlider.jsx
+++ /dev/null
@@ -1,21 +0,0 @@
-import React from 'react';
-import { PropTypes } from 'prop-types';
-
-const RightSlider = ({ styling, shown, children, rotate }) => (
-  <div
-    {...styling([
-      'rightSlider',
-      shown && 'rightSliderShown',
-      rotate && 'rightSliderRotate',
-      rotate && shown && 'rightSliderRotateShown'
-    ])}
-  >
-    {children}
-  </div>
-);
-
-RightSlider.propTypes = {
-  shown: PropTypes.bool
-};
-
-export default RightSlider;
diff --git a/packages/redux-devtools-inspector/src/RightSlider.tsx b/packages/redux-devtools-inspector/src/RightSlider.tsx
new file mode 100644
index 00000000..476fc4bb
--- /dev/null
+++ b/packages/redux-devtools-inspector/src/RightSlider.tsx
@@ -0,0 +1,37 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { StylingFunction } from 'react-base16-styling';
+
+interface Props {
+  styling: StylingFunction;
+  shown?: boolean;
+  children: React.ReactNode;
+  rotate?: boolean;
+}
+
+const RightSlider: React.FunctionComponent<Props> = ({
+  styling,
+  shown,
+  children,
+  rotate
+}) => (
+  <div
+    {...styling([
+      'rightSlider',
+      shown && 'rightSliderShown',
+      rotate && 'rightSliderRotate',
+      rotate && shown && 'rightSliderRotateShown'
+    ])}
+  >
+    {children}
+  </div>
+);
+
+RightSlider.propTypes = {
+  styling: PropTypes.func.isRequired,
+  shown: PropTypes.bool,
+  children: PropTypes.any.isRequired,
+  rotate: PropTypes.bool
+};
+
+export default RightSlider;
diff --git a/packages/redux-devtools-inspector/src/base16.ts b/packages/redux-devtools-inspector/src/base16.ts
new file mode 100644
index 00000000..2434e11c
--- /dev/null
+++ b/packages/redux-devtools-inspector/src/base16.ts
@@ -0,0 +1,61 @@
+declare module 'base16' {
+  export interface Base16Theme {
+    scheme?: string;
+    author?: string;
+    base00: string;
+    base01: string;
+    base02: string;
+    base03: string;
+    base04: string;
+    base05: string;
+    base06: string;
+    base07: string;
+    base08: string;
+    base09: string;
+    base0A: string;
+    base0B: string;
+    base0C: string;
+    base0D: string;
+    base0E: string;
+    base0F: string;
+  }
+
+  export const threezerotwofour: Base16Theme;
+  export const apathy: Base16Theme;
+  export const ashes: Base16Theme;
+  export const atelierDune: Base16Theme;
+  export const atelierForest: Base16Theme;
+  export const atelierHeath: Base16Theme;
+  export const atelierLakeside: Base16Theme;
+  export const atelierSeaside: Base16Theme;
+  export const bespin: Base16Theme;
+  export const brewer: Base16Theme;
+  export const bright: Base16Theme;
+  export const chalk: Base16Theme;
+  export const codeschool: Base16Theme;
+  export const colors: Base16Theme;
+  const _default: Base16Theme;
+  export default _default;
+  export const eighties: Base16Theme;
+  export const embers: Base16Theme;
+  export const flat: Base16Theme;
+  export const google: Base16Theme;
+  export const grayscale: Base16Theme;
+  export const greenscreen: Base16Theme;
+  export const harmonic: Base16Theme;
+  export const hopscotch: Base16Theme;
+  export const isotope: Base16Theme;
+  export const marrakesh: Base16Theme;
+  export const mocha: Base16Theme;
+  export const monokai: Base16Theme;
+  export const ocean: Base16Theme;
+  export const paraiso: Base16Theme;
+  export const pop: Base16Theme;
+  export const railscasts: Base16Theme;
+  export const shapeshifter: Base16Theme;
+  export const solarized: Base16Theme;
+  export const summerfruit: Base16Theme;
+  export const tomorrow: Base16Theme;
+  export const tube: Base16Theme;
+  export const twilight: Base16Theme;
+}
diff --git a/packages/redux-devtools-inspector/src/createDiffPatcher.js b/packages/redux-devtools-inspector/src/createDiffPatcher.ts
similarity index 51%
rename from packages/redux-devtools-inspector/src/createDiffPatcher.js
rename to packages/redux-devtools-inspector/src/createDiffPatcher.ts
index 34d056cd..dc931719 100644
--- a/packages/redux-devtools-inspector/src/createDiffPatcher.js
+++ b/packages/redux-devtools-inspector/src/createDiffPatcher.ts
@@ -1,28 +1,37 @@
-import { DiffPatcher } from 'jsondiffpatch/src/diffpatcher';
+import { DiffContext, DiffPatcher } from 'jsondiffpatch';
 
-const defaultObjectHash = (o, idx) =>
+const defaultObjectHash = (o: any, idx: number) =>
   (o === null && '$$null') ||
   (o && (o.id || o.id === 0) && `$$id:${JSON.stringify(o.id)}`) ||
   (o && (o._id || o._id === 0) && `$$_id:${JSON.stringify(o._id)}`) ||
   '$$index:' + idx;
 
-const defaultPropertyFilter = (name, context) =>
+const defaultPropertyFilter = (name: string, context: DiffContext) =>
   typeof context.left[name] !== 'function' &&
   typeof context.right[name] !== 'function';
 
 const defaultDiffPatcher = new DiffPatcher({
-  arrays: { detectMove: false },
+  arrays: { detectMove: false } as {
+    detectMove: boolean;
+    includeValueOnMove: boolean;
+  },
   objectHash: defaultObjectHash,
   propertyFilter: defaultPropertyFilter
 });
 
-export default function createDiffPatcher(objectHash, propertyFilter) {
+export default function createDiffPatcher(
+  objectHash: ((item: any, index: number) => string) | undefined,
+  propertyFilter: ((name: string, context: DiffContext) => boolean) | undefined
+) {
   if (!objectHash && !propertyFilter) {
     return defaultDiffPatcher;
   }
 
   return new DiffPatcher({
-    arrays: { detectMove: false },
+    arrays: { detectMove: false } as {
+      detectMove: boolean;
+      includeValueOnMove: boolean;
+    },
     objectHash: objectHash || defaultObjectHash,
     propertyFilter: propertyFilter || defaultPropertyFilter
   });
diff --git a/packages/redux-devtools-inspector/src/index.js b/packages/redux-devtools-inspector/src/index.js
deleted file mode 100644
index 2040c41e..00000000
--- a/packages/redux-devtools-inspector/src/index.js
+++ /dev/null
@@ -1 +0,0 @@
-export default from './DevtoolsInspector';
diff --git a/packages/redux-devtools-inspector/src/index.ts b/packages/redux-devtools-inspector/src/index.ts
new file mode 100644
index 00000000..d6ea9d8f
--- /dev/null
+++ b/packages/redux-devtools-inspector/src/index.ts
@@ -0,0 +1,2 @@
+import DevtoolsInspector from './DevtoolsInspector';
+export default DevtoolsInspector;
diff --git a/packages/redux-devtools-inspector/src/jss-nested.ts b/packages/redux-devtools-inspector/src/jss-nested.ts
new file mode 100644
index 00000000..b71cf34b
--- /dev/null
+++ b/packages/redux-devtools-inspector/src/jss-nested.ts
@@ -0,0 +1,6 @@
+declare module 'jss-nested' {
+  import { Plugin } from 'jss';
+
+  const jssNested: () => Plugin;
+  export default jssNested;
+}
diff --git a/packages/redux-devtools-inspector/src/jss-vendor-prefixer.ts b/packages/redux-devtools-inspector/src/jss-vendor-prefixer.ts
new file mode 100644
index 00000000..d75a9547
--- /dev/null
+++ b/packages/redux-devtools-inspector/src/jss-vendor-prefixer.ts
@@ -0,0 +1,6 @@
+declare module 'jss-vendor-prefixer' {
+  import { Plugin } from 'jss';
+
+  const jssVendorPrefixer: () => Plugin;
+  export default jssVendorPrefixer;
+}
diff --git a/packages/redux-devtools-inspector/src/jss.ts b/packages/redux-devtools-inspector/src/jss.ts
new file mode 100644
index 00000000..f63eaa9c
--- /dev/null
+++ b/packages/redux-devtools-inspector/src/jss.ts
@@ -0,0 +1,57 @@
+declare module 'jss' {
+  import * as css from 'csstype';
+
+  // TODO: Type data better, currently typed as any for allowing to override it
+  type FnValue<R> = R | ((data: any) => R);
+
+  type NormalCssProperties = css.Properties<string | number>;
+  type CssProperties = {
+    [K in keyof NormalCssProperties]: FnValue<NormalCssProperties[K]>;
+  };
+
+  // Jss Style definitions
+  type JssStyleP<S> = CssProperties & {
+    [key: string]: FnValue<JssValue | S>;
+  };
+
+  export type JssStyle = JssStyleP<
+    JssStyleP<JssStyleP<JssStyleP<JssStyleP<JssStyleP<JssStyleP<void>>>>>>
+  >;
+
+  export type Styles<Name extends string | number | symbol = string> = Record<
+    Name,
+    JssStyle | string
+  >;
+  export type Classes<Name extends string | number | symbol = string> = Record<
+    Name,
+    string
+  >;
+
+  export type JssValue =
+    | string
+    | number
+    | Array<string | number | Array<string | number> | '!important'>
+    | null
+    | false;
+
+  // eslint-disable-next-line @typescript-eslint/no-empty-interface
+  export interface Plugin {}
+
+  export interface StyleSheet<
+    RuleName extends string | number | symbol = string | number | symbol
+  > {
+    classes: Classes<RuleName>;
+    attach(): this;
+    detach(): this;
+  }
+
+  export interface Jss {
+    createStyleSheet<Name extends string | number | symbol>(
+      styles: Partial<Styles<Name>>
+    ): StyleSheet<Name>;
+    use(...plugins: Plugin[]): this;
+  }
+
+  const jss: Jss;
+  export default jss;
+}
diff --git a/packages/redux-devtools-inspector/src/react-base16-styling.ts b/packages/redux-devtools-inspector/src/react-base16-styling.ts
new file mode 100644
index 00000000..6967440c
--- /dev/null
+++ b/packages/redux-devtools-inspector/src/react-base16-styling.ts
@@ -0,0 +1,6 @@
+declare module 'react-base16-styling' {
+  export function getBase16Theme(
+    theme: Theme,
+    base16Themes?: Base16Theme[] | null
+  ): Base16Theme | undefined | null;
+}
diff --git a/packages/redux-devtools-inspector/src/react-dragula.ts b/packages/redux-devtools-inspector/src/react-dragula.ts
new file mode 100644
index 00000000..0b6ba9f0
--- /dev/null
+++ b/packages/redux-devtools-inspector/src/react-dragula.ts
@@ -0,0 +1,8 @@
+declare module 'react-dragula' {
+  import { DragulaOptions, Drake } from 'dragula';
+
+  export default function(
+    containers: Array<HTMLElement>,
+    options: DragulaOptions
+  ): Drake;
+}
diff --git a/packages/redux-devtools-inspector/src/react-pure-render.ts b/packages/redux-devtools-inspector/src/react-pure-render.ts
new file mode 100644
index 00000000..794702c7
--- /dev/null
+++ b/packages/redux-devtools-inspector/src/react-pure-render.ts
@@ -0,0 +1,6 @@
+declare module 'react-pure-render/function' {
+  export default function shouldPureComponentUpdate(
+    nextProps: unknown,
+    nextState: unknown
+  ): boolean;
+}
diff --git a/packages/redux-devtools-inspector/src/redux-devtools-themes.ts b/packages/redux-devtools-inspector/src/redux-devtools-themes.ts
new file mode 100644
index 00000000..895ce79d
--- /dev/null
+++ b/packages/redux-devtools-inspector/src/redux-devtools-themes.ts
@@ -0,0 +1,5 @@
+declare module 'redux-devtools-themes' {
+  import { Base16Theme } from 'base16';
+  export * from 'base16';
+  export const nicinabox: Base16Theme;
+}
diff --git a/packages/redux-devtools-inspector/src/redux.js b/packages/redux-devtools-inspector/src/redux.js
deleted file mode 100644
index 92033375..00000000
--- a/packages/redux-devtools-inspector/src/redux.js
+++ /dev/null
@@ -1,28 +0,0 @@
-const UPDATE_MONITOR_STATE = '@@redux-devtools-inspector/UPDATE_MONITOR_STATE';
-
-export const DEFAULT_STATE = {
-  selectedActionId: null,
-  startActionId: null,
-  inspectedActionPath: [],
-  inspectedStatePath: [],
-  tabName: 'Diff'
-};
-
-export function updateMonitorState(monitorState) {
-  return { type: UPDATE_MONITOR_STATE, monitorState };
-}
-
-function reduceUpdateState(state, action) {
-  return action.type === UPDATE_MONITOR_STATE
-    ? {
-        ...state,
-        ...action.monitorState
-      }
-    : state;
-}
-
-export function reducer(props, state = DEFAULT_STATE, action) {
-  return {
-    ...reduceUpdateState(state, action)
-  };
-}
diff --git a/packages/redux-devtools-inspector/src/redux.ts b/packages/redux-devtools-inspector/src/redux.ts
new file mode 100644
index 00000000..8fd7f2d2
--- /dev/null
+++ b/packages/redux-devtools-inspector/src/redux.ts
@@ -0,0 +1,52 @@
+import { Action } from 'redux';
+import { Props } from './DevtoolsInspector';
+
+const UPDATE_MONITOR_STATE = '@@redux-devtools-inspector/UPDATE_MONITOR_STATE';
+interface UpdateMonitorStateAction {
+  type: typeof UPDATE_MONITOR_STATE;
+  monitorState: Partial<MonitorState>;
+}
+
+export type MonitorAction = UpdateMonitorStateAction;
+
+export interface MonitorState {
+  readonly selectedActionId: number | null;
+  readonly startActionId: number | null;
+  readonly inspectedActionPath: (string | number)[];
+  readonly inspectedStatePath: (string | number)[];
+  readonly tabName: string;
+  readonly searchValue?: string;
+}
+
+export const DEFAULT_STATE: MonitorState = {
+  selectedActionId: null,
+  startActionId: null,
+  inspectedActionPath: [],
+  inspectedStatePath: [],
+  tabName: 'Diff'
+};
+
+export function updateMonitorState(
+  monitorState: Partial<MonitorState>
+): UpdateMonitorStateAction {
+  return { type: UPDATE_MONITOR_STATE, monitorState };
+}
+
+function reduceUpdateState(state: MonitorState, action: MonitorAction) {
+  return action.type === UPDATE_MONITOR_STATE
+    ? {
+        ...state,
+        ...action.monitorState
+      }
+    : state;
+}
+
+export function reducer<S, A extends Action<unknown>>(
+  props: Props<S, A>,
+  state = DEFAULT_STATE,
+  action: MonitorAction
+) {
+  return {
+    ...reduceUpdateState(state, action)
+  };
+}
diff --git a/packages/redux-devtools-inspector/src/tabs/ActionTab.jsx b/packages/redux-devtools-inspector/src/tabs/ActionTab.tsx
similarity index 51%
rename from packages/redux-devtools-inspector/src/tabs/ActionTab.jsx
rename to packages/redux-devtools-inspector/src/tabs/ActionTab.tsx
index e2a91800..320e3544 100644
--- a/packages/redux-devtools-inspector/src/tabs/ActionTab.jsx
+++ b/packages/redux-devtools-inspector/src/tabs/ActionTab.tsx
@@ -1,9 +1,15 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 import JSONTree from 'react-json-tree';
 import getItemString from './getItemString';
 import getJsonTreeTheme from './getJsonTreeTheme';
+import { TabComponentProps } from '../ActionPreview';
+import { Action } from 'redux';
 
-const ActionTab = ({
+const ActionTab: React.FunctionComponent<TabComponentProps<
+  unknown,
+  Action<unknown>
+>> = ({
   action,
   styling,
   base16Theme,
@@ -24,4 +30,14 @@ const ActionTab = ({
   />
 );
 
+ActionTab.propTypes = {
+  action: PropTypes.any.isRequired,
+  styling: PropTypes.func.isRequired,
+  base16Theme: PropTypes.any.isRequired,
+  invertTheme: PropTypes.bool.isRequired,
+  labelRenderer: PropTypes.func.isRequired,
+  dataTypeKey: PropTypes.string,
+  isWideLayout: PropTypes.bool.isRequired
+};
+
 export default ActionTab;
diff --git a/packages/redux-devtools-inspector/src/tabs/DiffTab.jsx b/packages/redux-devtools-inspector/src/tabs/DiffTab.jsx
deleted file mode 100644
index 8934c785..00000000
--- a/packages/redux-devtools-inspector/src/tabs/DiffTab.jsx
+++ /dev/null
@@ -1,24 +0,0 @@
-import React from 'react';
-import JSONDiff from './JSONDiff';
-
-const DiffTab = ({
-  delta,
-  styling,
-  base16Theme,
-  invertTheme,
-  labelRenderer,
-  isWideLayout
-}) => (
-  <JSONDiff
-    {...{
-      delta,
-      styling,
-      base16Theme,
-      invertTheme,
-      labelRenderer,
-      isWideLayout
-    }}
-  />
-);
-
-export default DiffTab;
diff --git a/packages/redux-devtools-inspector/src/tabs/DiffTab.tsx b/packages/redux-devtools-inspector/src/tabs/DiffTab.tsx
new file mode 100644
index 00000000..62605335
--- /dev/null
+++ b/packages/redux-devtools-inspector/src/tabs/DiffTab.tsx
@@ -0,0 +1,42 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import JSONDiff from './JSONDiff';
+import { TabComponentProps } from '../ActionPreview';
+import { Action } from 'redux';
+
+const DiffTab: React.FunctionComponent<TabComponentProps<
+  unknown,
+  Action<unknown>
+>> = ({
+  delta,
+  styling,
+  base16Theme,
+  invertTheme,
+  labelRenderer,
+  isWideLayout,
+  dataTypeKey
+}) => (
+  <JSONDiff
+    {...{
+      delta,
+      styling,
+      base16Theme,
+      invertTheme,
+      labelRenderer,
+      isWideLayout,
+      dataTypeKey
+    }}
+  />
+);
+
+DiffTab.propTypes = {
+  delta: PropTypes.any,
+  styling: PropTypes.func.isRequired,
+  base16Theme: PropTypes.any.isRequired,
+  invertTheme: PropTypes.bool.isRequired,
+  labelRenderer: PropTypes.func.isRequired,
+  isWideLayout: PropTypes.bool.isRequired,
+  dataTypeKey: PropTypes.string
+};
+
+export default DiffTab;
diff --git a/packages/redux-devtools-inspector/src/tabs/JSONDiff.jsx b/packages/redux-devtools-inspector/src/tabs/JSONDiff.tsx
similarity index 73%
rename from packages/redux-devtools-inspector/src/tabs/JSONDiff.jsx
rename to packages/redux-devtools-inspector/src/tabs/JSONDiff.tsx
index 3afa43b0..c919284b 100644
--- a/packages/redux-devtools-inspector/src/tabs/JSONDiff.jsx
+++ b/packages/redux-devtools-inspector/src/tabs/JSONDiff.tsx
@@ -3,8 +3,10 @@ import JSONTree from 'react-json-tree';
 import stringify from 'javascript-stringify';
 import getItemString from './getItemString';
 import getJsonTreeTheme from './getJsonTreeTheme';
+import { Delta } from 'jsondiffpatch';
+import { Base16Theme, StylingFunction } from 'react-base16-styling';
 
-function stringifyAndShrink(val, isWideLayout) {
+function stringifyAndShrink(val: any, isWideLayout?: boolean) {
   if (val === null) {
     return 'null';
   }
@@ -19,18 +21,22 @@ function stringifyAndShrink(val, isWideLayout) {
   return str.length > 22 ? `${str.substr(0, 15)}…${str.substr(-5)}` : str;
 }
 
-const expandFirstLevel = (keyName, data, level) => level <= 1;
+const expandFirstLevel = (
+  keyName: (string | number)[],
+  data: any,
+  level: number
+) => level <= 1;
 
-function prepareDelta(value) {
+function prepareDelta(value: any) {
   if (value && value._t === 'a') {
-    const res = {};
-    for (let key in value) {
+    const res: { [key: string]: any } = {};
+    for (const key in value) {
       if (key !== '_t') {
-        if (key[0] === '_' && !value[key.substr(1)]) {
+        if (key.startsWith('_') && !value[key.substr(1)]) {
           res[key.substr(1)] = value[key];
         } else if (value['_' + key]) {
           res[key] = [value['_' + key][0], value[key][0]];
-        } else if (!value['_' + key] && key[0] !== '_') {
+        } else if (!value['_' + key] && !key.startsWith('_')) {
           res[key] = value[key];
         }
       }
@@ -41,14 +47,33 @@ function prepareDelta(value) {
   return value;
 }
 
-export default class JSONDiff extends Component {
+interface Props {
+  delta: Delta | null | undefined | false;
+  styling: StylingFunction;
+  base16Theme: Base16Theme;
+  invertTheme: boolean;
+  labelRenderer: (
+    keyPath: (string | number)[],
+    nodeType: string,
+    expanded: boolean,
+    expandable: boolean
+  ) => React.ReactNode;
+  isWideLayout: boolean;
+  dataTypeKey: string | undefined;
+}
+
+interface State {
+  data: any;
+}
+
+export default class JSONDiff extends Component<Props, State> {
   state = { data: {} };
 
   componentDidMount() {
     this.updateData();
   }
 
-  componentDidUpdate(prevProps) {
+  componentDidUpdate(prevProps: Props) {
     if (prevProps.delta !== this.props.delta) {
       this.updateData();
     }
@@ -84,7 +109,7 @@ export default class JSONDiff extends Component {
     );
   }
 
-  getItemString = (type, data) =>
+  getItemString = (type: string, data: any) =>
     getItemString(
       this.props.styling,
       type,
@@ -94,10 +119,10 @@ export default class JSONDiff extends Component {
       true
     );
 
-  valueRenderer = (raw, value) => {
+  valueRenderer = (raw: any, value: any) => {
     const { styling, isWideLayout } = this.props;
 
-    function renderSpan(name, body) {
+    function renderSpan(name: string, body: string) {
       return (
         <span key={name} {...styling(['diff', name])}>
           {body}
diff --git a/packages/redux-devtools-inspector/src/tabs/StateTab.jsx b/packages/redux-devtools-inspector/src/tabs/StateTab.tsx
similarity index 52%
rename from packages/redux-devtools-inspector/src/tabs/StateTab.jsx
rename to packages/redux-devtools-inspector/src/tabs/StateTab.tsx
index 59064bad..9e46fe1d 100644
--- a/packages/redux-devtools-inspector/src/tabs/StateTab.jsx
+++ b/packages/redux-devtools-inspector/src/tabs/StateTab.tsx
@@ -1,9 +1,15 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 import JSONTree from 'react-json-tree';
 import getItemString from './getItemString';
 import getJsonTreeTheme from './getJsonTreeTheme';
+import { TabComponentProps } from '../ActionPreview';
+import { Action } from 'redux';
 
-const StateTab = ({
+const StateTab: React.FunctionComponent<TabComponentProps<
+  any,
+  Action<unknown>
+>> = ({
   nextState,
   styling,
   base16Theme,
@@ -24,4 +30,14 @@ const StateTab = ({
   />
 );
 
+StateTab.propTypes = {
+  nextState: PropTypes.any.isRequired,
+  styling: PropTypes.func.isRequired,
+  base16Theme: PropTypes.any.isRequired,
+  invertTheme: PropTypes.bool.isRequired,
+  labelRenderer: PropTypes.func.isRequired,
+  dataTypeKey: PropTypes.string,
+  isWideLayout: PropTypes.bool.isRequired
+};
+
 export default StateTab;
diff --git a/packages/redux-devtools-inspector/src/tabs/getItemString.js b/packages/redux-devtools-inspector/src/tabs/getItemString.tsx
similarity index 79%
rename from packages/redux-devtools-inspector/src/tabs/getItemString.js
rename to packages/redux-devtools-inspector/src/tabs/getItemString.tsx
index 71e8d303..ce18766b 100644
--- a/packages/redux-devtools-inspector/src/tabs/getItemString.js
+++ b/packages/redux-devtools-inspector/src/tabs/getItemString.tsx
@@ -1,10 +1,11 @@
 import React from 'react';
 import { Iterable } from 'immutable';
 import isIterable from '../utils/isIterable';
+import { StylingFunction } from 'react-base16-styling';
 
 const IS_IMMUTABLE_KEY = '@@__IS_IMMUTABLE__@@';
 
-function isImmutable(value) {
+function isImmutable(value: any) {
   return (
     Iterable.isKeyed(value) ||
     Iterable.isIndexed(value) ||
@@ -12,7 +13,7 @@ function isImmutable(value) {
   );
 }
 
-function getShortTypeString(val, diff) {
+function getShortTypeString(val: any, diff: boolean | undefined) {
   if (diff && Array.isArray(val)) {
     val = val[val.length === 2 ? 1 : 0];
   }
@@ -38,7 +39,12 @@ function getShortTypeString(val, diff) {
   }
 }
 
-function getText(type, data, isWideLayout, isDiff) {
+function getText(
+  type: string,
+  data: any,
+  isWideLayout: boolean,
+  isDiff: boolean | undefined
+) {
   if (type === 'Object') {
     const keys = Object.keys(data);
     if (!isWideLayout) return keys.length ? '{…}' : '{}';
@@ -55,7 +61,7 @@ function getText(type, data, isWideLayout, isDiff) {
 
     const str = data
       .slice(0, 4)
-      .map(val => getShortTypeString(val, isDiff))
+      .map((val: any) => getShortTypeString(val, isDiff))
       .concat(data.length > 4 ? ['…'] : [])
       .join(', ');
 
@@ -66,12 +72,12 @@ function getText(type, data, isWideLayout, isDiff) {
 }
 
 const getItemString = (
-  styling,
-  type,
-  data,
-  dataTypeKey,
-  isWideLayout,
-  isDiff
+  styling: StylingFunction,
+  type: string,
+  data: any,
+  dataTypeKey: string | undefined,
+  isWideLayout: boolean,
+  isDiff?: boolean
 ) => (
   <span {...styling('treeItemHint')}>
     {data[IS_IMMUTABLE_KEY] ? 'Immutable' : ''}
diff --git a/packages/redux-devtools-inspector/src/tabs/getJsonTreeTheme.js b/packages/redux-devtools-inspector/src/tabs/getJsonTreeTheme.ts
similarity index 62%
rename from packages/redux-devtools-inspector/src/tabs/getJsonTreeTheme.js
rename to packages/redux-devtools-inspector/src/tabs/getJsonTreeTheme.ts
index 7bb2942a..0b382542 100644
--- a/packages/redux-devtools-inspector/src/tabs/getJsonTreeTheme.js
+++ b/packages/redux-devtools-inspector/src/tabs/getJsonTreeTheme.ts
@@ -1,6 +1,10 @@
-export default function getJsonTreeTheme(base16Theme) {
+import { Base16Theme, StylingConfig, StylingValue } from 'react-base16-styling';
+
+export default function getJsonTreeTheme(
+  base16Theme: Base16Theme
+): StylingConfig {
   return {
-    extend: base16Theme,
+    extend: base16Theme as StylingValue,
     nestedNode: ({ style }, keyPath, nodeType, expanded) => ({
       style: {
         ...style,
diff --git a/packages/redux-devtools-inspector/src/themes/index.js b/packages/redux-devtools-inspector/src/themes/index.ts
similarity index 100%
rename from packages/redux-devtools-inspector/src/themes/index.js
rename to packages/redux-devtools-inspector/src/themes/index.ts
diff --git a/packages/redux-devtools-inspector/src/themes/inspector.js b/packages/redux-devtools-inspector/src/themes/inspector.ts
similarity index 100%
rename from packages/redux-devtools-inspector/src/themes/inspector.js
rename to packages/redux-devtools-inspector/src/themes/inspector.ts
diff --git a/packages/redux-devtools-inspector/src/utils/createStylingFromTheme.js b/packages/redux-devtools-inspector/src/utils/createStylingFromTheme.ts
similarity index 94%
rename from packages/redux-devtools-inspector/src/utils/createStylingFromTheme.js
rename to packages/redux-devtools-inspector/src/utils/createStylingFromTheme.ts
index a4603412..355651c1 100644
--- a/packages/redux-devtools-inspector/src/utils/createStylingFromTheme.js
+++ b/packages/redux-devtools-inspector/src/utils/createStylingFromTheme.ts
@@ -1,7 +1,7 @@
-import jss from 'jss';
+import jss, { Styles, StyleSheet } from 'jss';
 import jssVendorPrefixer from 'jss-vendor-prefixer';
 import jssNested from 'jss-nested';
-import { createStyling } from 'react-base16-styling';
+import { Base16Theme, createStyling } from 'react-base16-styling';
 import rgba from 'hex-rgba';
 import inspector from '../themes/inspector';
 import * as reduxThemes from 'redux-devtools-themes';
@@ -10,7 +10,7 @@ import * as inspectorThemes from '../themes';
 jss.use(jssVendorPrefixer());
 jss.use(jssNested());
 
-const colorMap = theme => ({
+const colorMap = (theme: Base16Theme) => ({
   TEXT_COLOR: theme.base06,
   TEXT_PLACEHOLDER_COLOR: rgba(theme.base06, 60),
   BACKGROUND_COLOR: theme.base00,
@@ -36,7 +36,12 @@ const colorMap = theme => ({
   ERROR_COLOR: theme.base08
 });
 
-const getSheetFromColorMap = map => ({
+type Color = keyof ReturnType<typeof colorMap>;
+type ColorMap = {
+  [color in Color]: string;
+};
+
+const getSheetFromColorMap = (map: ColorMap): Partial<Styles> => ({
   inspector: {
     display: 'flex',
     'flex-direction': 'column',
@@ -386,9 +391,9 @@ const getSheetFromColorMap = map => ({
   }
 });
 
-let themeSheet;
+let themeSheet: StyleSheet;
 
-const getDefaultThemeStyling = theme => {
+const getDefaultThemeStyling = (theme: Base16Theme) => {
   if (themeSheet) {
     themeSheet.detach();
   }
@@ -400,7 +405,10 @@ const getDefaultThemeStyling = theme => {
   return themeSheet.classes;
 };
 
-export const base16Themes = { ...reduxThemes, ...inspectorThemes };
+export const base16Themes = ({
+  ...reduxThemes,
+  ...inspectorThemes
+} as unknown) as Base16Theme[];
 
 export const createStylingFromTheme = createStyling(getDefaultThemeStyling, {
   defaultBase16: inspector,
diff --git a/packages/redux-devtools-inspector/src/utils/deepMap.js b/packages/redux-devtools-inspector/src/utils/deepMap.js
deleted file mode 100644
index 88d3dca0..00000000
--- a/packages/redux-devtools-inspector/src/utils/deepMap.js
+++ /dev/null
@@ -1,30 +0,0 @@
-function deepMapCached(obj, f, ctx, cache) {
-  cache.push(obj);
-  if (Array.isArray(obj)) {
-    return obj.map(function(val, key) {
-      val = f.call(ctx, val, key);
-      return typeof val === 'object' && cache.indexOf(val) === -1
-        ? deepMapCached(val, f, ctx, cache)
-        : val;
-    });
-  } else if (typeof obj === 'object') {
-    const res = {};
-    for (const key in obj) {
-      let val = obj[key];
-      if (val && typeof val === 'object') {
-        val = f.call(ctx, val, key);
-        res[key] =
-          cache.indexOf(val) === -1 ? deepMapCached(val, f, ctx, cache) : val;
-      } else {
-        res[key] = f.call(ctx, val, key);
-      }
-    }
-    return res;
-  } else {
-    return obj;
-  }
-}
-
-export default function deepMap(obj, f, ctx) {
-  return deepMapCached(obj, f, ctx, []);
-}
diff --git a/packages/redux-devtools-inspector/src/utils/getInspectedState.js b/packages/redux-devtools-inspector/src/utils/getInspectedState.ts
similarity index 72%
rename from packages/redux-devtools-inspector/src/utils/getInspectedState.js
rename to packages/redux-devtools-inspector/src/utils/getInspectedState.ts
index 321233fe..4966895c 100644
--- a/packages/redux-devtools-inspector/src/utils/getInspectedState.js
+++ b/packages/redux-devtools-inspector/src/utils/getInspectedState.ts
@@ -1,10 +1,10 @@
 import { Iterable, fromJS } from 'immutable';
 import isIterable from './isIterable';
 
-function iterateToKey(obj, key) {
+function iterateToKey(obj: any, key: string | number) {
   // maybe there's a better way, dunno
   let idx = 0;
-  for (let entry of obj) {
+  for (const entry of obj) {
     if (Array.isArray(entry)) {
       if (entry[0] === key) return entry[1];
     } else {
@@ -15,11 +15,15 @@ function iterateToKey(obj, key) {
   }
 }
 
-export default function getInspectedState(state, path, convertImmutable) {
+export default function getInspectedState<S>(
+  state: S,
+  path: (string | number)[],
+  convertImmutable: boolean
+): S {
   state =
     path && path.length
-      ? {
-          [path[path.length - 1]]: path.reduce((s, key) => {
+      ? ({
+          [path[path.length - 1]]: path.reduce((s: any, key) => {
             if (!s) {
               return s;
             }
@@ -32,7 +36,7 @@ export default function getInspectedState(state, path, convertImmutable) {
 
             return s[key];
           }, state)
-        }
+        } as S)
       : state;
 
   if (convertImmutable) {
diff --git a/packages/redux-devtools-inspector/src/utils/isIterable.js b/packages/redux-devtools-inspector/src/utils/isIterable.ts
similarity index 76%
rename from packages/redux-devtools-inspector/src/utils/isIterable.js
rename to packages/redux-devtools-inspector/src/utils/isIterable.ts
index 45f33b64..a7226ad0 100644
--- a/packages/redux-devtools-inspector/src/utils/isIterable.js
+++ b/packages/redux-devtools-inspector/src/utils/isIterable.ts
@@ -1,4 +1,4 @@
-export default function isIterable(obj) {
+export default function isIterable(obj: any) {
   return (
     obj !== null &&
     typeof obj === 'object' &&
diff --git a/packages/redux-devtools-inspector/tsconfig.json b/packages/redux-devtools-inspector/tsconfig.json
new file mode 100644
index 00000000..7b7d1492
--- /dev/null
+++ b/packages/redux-devtools-inspector/tsconfig.json
@@ -0,0 +1,7 @@
+{
+  "extends": "../../tsconfig.react.base.json",
+  "compilerOptions": {
+    "outDir": "lib"
+  },
+  "include": ["src"]
+}