Test Your HTTP Cache Headers
Enter the URL of a webpage, image, script, font, or any other file to see the relevant caching headers returned from the server or CDN.
Enter a URL to get started!
Online HTTP Cache Checker
This tool shows how web browsers will cache a URL. HTTP caching reuses previously loaded resources and can greatly impact performance. Learn more about HTTP Caching.
Request Metrics is application monitoring for the front-end. Understand your real
users, and how they experience your application. Fix the bugs and problems that get
in the way of your users. Respond to outages and attacks quickly with Request Metrics.
Get visibility into your web app in minutes instead of months.