Why we built this
Page speed isn't just a developer preference — it's a direct factor in search rankings, conversion rates, and whether visitors stay long enough to read your content. But the mainstream performance testing tools are either overwhelming (a wall of waterfall charts and metrics you'd need a course to interpret) or oversimplified ("your site is slow, upgrade to premium to find out why").
We built Site Speed Check to sit in the middle: real performance measurements against the metrics that actually matter — Core Web Vitals, time to first byte, largest contentful paint, total page weight — with plain-English explanations for each one and concrete, prioritised recommendations for what to fix first. No signup and no credit card. Scans are rate-limited per visitor so that automated traffic cannot exhaust the tool for everyone else — normal use will not come close. Just run it and read the report.
Who's behind it
Site Speed Check is built and maintained by JWWD, an independent Australian web development studio run by Jason Williams, who has been building for the web since 2000. We've obsessed over performance the entire time — fast sites are a better experience, full stop.
Our other free tools
Site Speed Check is one of a small suite of free, no-signup tools we maintain for developers and site owners:
- Meta Tag Checker — audit a page's meta tags, Open Graph, and schema.
- Broken Link Finder — crawl a site for dead links and bad redirects.
- SSL Checker — inspect a site's TLS certificate, chain, and expiry.
- DMARC Dashboard — check and monitor your email authentication records.
Get in touch
Got a question, a bug report, or a feature request? Head to our contact page and send us a message — we read every one.