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Yellow Lab Toolswebhint
Free

Free and open source under the GPL-2.0 licence.

 Free

Free open-source project hosted by the OpenJS Foundation.

Web, Self-hosted, Command line Browser extension, Command line
  • Checks front-end code quality as well as speed
  • Detailed explanations of each issue
  • Same checks available in the editor, the browser and CI
  • Built into Microsoft Edge DevTools
  • Development has slowed, with the last repository push in early 2024
  • Docker image is maintained by a third party
  • The CLI requires Node.js and npx
  • Aimed at developers rather than site owners who want a one-click report
Downloadable app, Web application, Self-hosted Downloadable app, Browser extension
Open source Open source
License: GPL-2.0 License not stated
No account needed No account needed
Not stated if it works offline Not stated if it works offline

Checked September 23, 2026

Checked September 24, 2026

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