Free website speed test
Free website speed test with TTFB and page size
Check how quickly a page responds from the server, how long it takes to download, and whether the response is light enough.
Website speed test FAQ
What does this website speed test measure?
It fetches a URL from the server and reports time to first byte, total download time, response size, HTTP status, and a simple performance grade.
Is the speed test the same as Core Web Vitals?
No. This tool measures server fetch timing and HTML response weight. Core Web Vitals also include browser rendering, layout shift, and interaction metrics.
Why does script size matter for analytics?
Large analytics scripts can slow pages and reduce conversion rates. DataFast uses a tiny tracking script to keep analytics from hurting page speed.