---
title: Redoc quickstart guide
---
# Redoc quickstart guide
To render your OpenAPI definition using Redoc, use the following HTML code sample and
replace the `spec-url` attribute with the URL or local file address to your definition.
```html
<!DOCTYPE html>
<html>
<head>
<title>Redoc</title>
<!-- needed for adaptive design -->
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<link
href="https://fonts.googleapis.com/css?family=Montserrat:300,400,700|Roboto:300,400,700"
rel="stylesheet"
/>
<!--
Redoc doesn't change outer page styles
-->
<style>
body {
margin: 0;
padding: 0;
}
</style>
</head>
<body>
<!--
Redoc element with link to your OpenAPI definition
-->
<redoc spec-url="http://petstore.swagger.io/v2/swagger.json"></redoc>
<!--
Link to Redoc JavaScript on CDN for rendering standalone element
-->
<script src="https://cdn.redoc.ly/redoc/latest/bundles/redoc.standalone.js"></script>
</body>
</html>
```
:::attention Redoc requires an HTTP server to run locally
Loading local OpenAPI definitions is impossible without running a web server because of issues with
[same-origin policy](https://developer.mozilla.org/en-US/docs/Web/Security/Same-origin_policy) and
other security reasons. Refer to [Running Redoc locally](./deployment/intro.md#how-to-run-redoc-locally) for more information.
:::
For a more detailed explanation with step-by-step instructions and additional options for using Redoc, refer to the [Redoc deployment guide](./deployment/intro.md).