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webhint vs Yellow Lab Tools: catalog facts
webhint	Yellow Lab Tools
Free Free open-source project hosted by the OpenJS Foundation.	Free Free and open source under the GPL-2.0 licence.
Browser extension, Command line	Web, Self-hosted, Command line
Same checks available in the editor, the browser and CI Built into Microsoft Edge DevTools	Checks front-end code quality as well as speed Detailed explanations of each issue
The CLI requires Node.js and npx Aimed at developers rather than site owners who want a one-click report	Development has slowed, with the last repository push in early 2024 Docker image is maintained by a third party
Downloadable app, Browser extension	Downloadable app, Web application, Self-hosted
Open source	Open source
License not stated	License: GPL-2.0
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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