SU Speed & Uptime WatchWebsite speed tests and uptime monitoring
How it works
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How fast is your website?

Enter an address. We load the page the way a browser does, time every file and tell you exactly what to improve.

Try an example:

Every request, in order

A waterfall shows each file: DNS, connection, TLS, waiting for the server and download - plus size, type and domain.

A grade with a to-do list

Fourteen checks - compression, caching, images, render-blocking files, redirects, HTTPS - each with what to change.

Watch it around the clock

Sign in to monitor uptime every 30 seconds from several probes, get alerts on LINE, Slack, Teams or e-mail and publish a status page.

About this test. The page and the files its HTML and style sheets ask for are downloaded with up to six connections per site, like a browser. Code from the tested site is never run, so files a script would load later are not included. Only public addresses can be tested. Results get a private link you can share.