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---
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seo:
title: Redoc quickstart guide
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---
# 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 >
```
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{% admonition type="attention" name="Redoc requires an HTTP server to run locally" %}
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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.
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{% /admonition %}
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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 ).
