Free · no account needed
Free performance tools
Check any page or site against the numbers search engines use — lab tests that load the page, and Chrome's data from real visitors. Every result has its own link you can share.
Website speed test
A full Lighthouse test of any page — performance, accessibility, best practices and SEO, with what to fix first.
Core Web Vitals checker
Does a page pass Google's Core Web Vitals for real visitors? Instant, from Chrome's field data, for the page and the whole site.
SEO checker
Every technical SEO check Lighthouse runs — titles, descriptions, crawlability, links, structured data — and what each one means.
TTFB test
How long your server takes to answer, for real visitors and in a lab run — and the usual reasons it is slow.
Compare websites
Put up to four sites side by side on real-user Core Web Vitals. Built for pitching a client against their competitors.