Sitespeed.io
sitespeed.io tests and monitors website speed using real browsers and reports Core Web Vitals; it is open source and runs on your own infrastructure.
- GitHub stars
- 5k
- Last commit
- 2 days ago
- Latest release
- v42.7.0
- Licence
- MIT
- Self-hosted
- Yes
sitespeed.io is open-source software for measuring web performance. You run it against a page or a set of pages, and it drives real browsers to measure how fast they load, producing an HTML report that includes Core Web Vitals and a video recording, so you can debug a slow page or compare changes over time.
It can be installed with Docker or Node.js, supports basic and advanced configuration, and includes guidance for mobile testing. Teams run it from CI or on a schedule to monitor performance continuously and catch regressions. The repository lists metrics, performance analysis and dashboards among its topics, and the project is active on Bluesky and Mastodon with a public changelog.
sitespeed.io is written in JavaScript and licensed under MIT. It runs on your own machines or servers, so no hosted account is needed. It suits front-end developers, performance engineers and operations teams that want self-controlled performance budgets and monitoring.
Key features
- Real browser performance testing
- HTML reports with Core Web Vitals
- Video recordings of page loads
- Docker and Node.js installation
- Mobile testing support
- Continuous monitoring from CI or schedules
Pricing: Free and open source under the MIT license.
