Is It Cached?

Is It Cached? gives you an overview about the browser cache, all cache-relevant response headers and also detects multiple CDNs.You spend lots of time to optimize your infrastructure to make sure you servers respond with correct cache headers?

You use a CDN to speed-up your content delivery but you don't know if it is really working?

This extension for the developer tools gives you an overview about all relevant request headers (method, if-modified-since, if-none-match) and response headers (cache-control, pragma, last-modified, etag) in one single table.

It also detects if elements are fetched through a CDN and shows you the cache status of the CDN (currently only Cloudflare is supported).

You find more information, explanation about the used colors and a changelog here: http://raphael.vullriede.de/is-it-cached/

new in version 0.8.1:
- support for edgecast (http://www.edgecast.com), thanks to Andrew White for the tip!

new in version 0.8:
- Switched to jQuery for better table customization.
- Table columns are now sortable.
- New column indicating the compression status.
- Tooltip with more detailed information for compression status, CDN header, and content type.
- Matched if-modified-since/last-modified and if-none-match/etag are now beeing highlighted.


new in version 0.6:
- first public release