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LighthouseYellow Lab Tools
Free

The open-source tool is available without a license fee.

 Free

Free and open source under the GPL-2.0 licence.

Windows, macOS, Linux, Web, Command line Web, Self-hosted, Command line
  • Turns vague performance complaints into a specific, prioritised list
  • Runs in CI as well as in the browser, so regressions can be caught
  • Checks front-end code quality as well as speed
  • Detailed explanations of each issue
  • Scores vary between runs and depend heavily on the machine and network
  • A good score is not the same as a fast experience for real users
  • Development has slowed, with the last repository push in early 2024
  • Docker image is maintained by a third party
Downloadable app Downloadable app, Web application, Self-hosted
Open source Open source
License: Apache-2.0 License: GPL-2.0
Not stated if an account is needed No account needed
Not stated if it works offline Not stated if it works offline

Checked September 22, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.