Development Mode temporarily suspends Cloudflare's edge caching and [Polish](https://developers.cloudflare.com/images/polish/) features for three hours unless disabled beforehand. Development Mode allows customers to immediately observe changes to their cacheable content like images, CSS, or JavaScript.

Note

To bypass cache for longer than three hours, use bypass cache in [Cache Rules](https://developers.cloudflare.com/cache/how-to/cache-rules/settings/#bypass-cache).

## Enable Development Mode

Development Mode temporarily bypasses Cloudflare's cache and does not purge cached files. To instantly purge your Cloudflare cache, refer to [purge cache](https://developers.cloudflare.com/cache/how-to/purge-cache/).

1. Log in to your Cloudflare account.
2. Select your domain.
3. Select **Caching**.
4. Toggle **Development Mode** to **On**.
