CDN Detector

Chrome extension to check for CDN usage.

While working on a recent web project I found the need to easily see if the a website was being cached correctly via a CDN (AWS CloudFront in this case). While I could do this easily with a quick curl command to view the headers, this was not possible for the client.

To get around this I created a Chrome extension that provides a colour coded icon and some basic info about CDN usage. When it detects a CDN hit, the icon goes green, if its a miss, it is red and the default state is grey.

Where possible, it provides the UTC time that the page was cached.

Analytics

At the moment, the extension uses Google Analytics to track Hits & Misses, but does not pass along any other information.

In the next release I will add an option to disable this tracking.

Going Forward

I will add more CDN's to the list that the extension can detect and improve this page to be more of a project landing page, hopefully with metrics about CDN usage.