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Pa11y vs webhint: catalog facts
Pa11y	webhint
Free Free and open source.	Free Free open-source project hosted by the OpenJS Foundation.
Self-hosted, Command line	Browser extension, Command line
Command-line tool for quick one-off accessibility checks CI tool for testing a list of pages in builds	Same checks available in the editor, the browser and CI Built into Microsoft Edge DevTools
Automated checks catch only part of all accessibility problems The dashboard requires running your own server	The CLI requires Node.js and npx Aimed at developers rather than site owners who want a one-click report
Downloadable app, Self-hosted	Downloadable app, Browser extension
Open source	Open source
License not stated	License not stated
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 23, 2026	Official website Full listing and sources Checked September 24, 2026

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