Uptime & Dependency Checker
Check if your website and all its dependencies actually work, from one of our 8 global monitoring locations. Detect broken CDNs, scripts, fonts, and APIs.
Free tool · No signup required · Runs on our 8-location global network
What This Tool Checks
How the Availability Checker Works
1. The Request: We send an HTTP request to your website from the monitoring location you pick, out of 8 worldwide: New York, San Francisco, Toronto, London, Amsterdam, Singapore, Bangalore, and Sydney. Monitors on a paid plan check from several of them at once.
2. Dependency Verification: For each region, we also check if all external resources your page needs (scripts, stylesheets, fonts, images) are loading correctly.
3. Detailed Results: You get response times, HTTP status codes, and a breakdown of all external resources — including any that failed to load.
Frequently Asked Questions
Check your site every minute, not just once
This tool checks your site right now. Uptime monitoring checks it continuously from every location your plan covers and alerts you the moment something goes wrong.
Set up free uptime monitoring →