# 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
Redoc
```
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](/docs/redoc/v2.x/deployment/intro#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](/docs/redoc/v2.x/deployment/intro).