sitespeed.io
Automated performance tests
Official site consultedTesting and performance
Last verified: 1 October 2026
sitespeed.io is an open-source web performance testing tool available since 2012, usable once or for continuous monitoring. It generates HTML reports with Core Web Vitals.
Services
- HTML reports, load videos, HAR waterfalls
- LCP, INP, CLS, FCP, TTFB metrics
- User journey scripting
- Export to Graphite or InfluxDB
- Tests on Chrome, Firefox, Edge, Safari, Android, iOS
Access requirements
Free, no sign-up; install with Docker or npm.
Sources
- sitespeed.io (new tab), verified on 1 October 2026Official site consulted