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W3C Link Checker vs Integrity: catalog facts
W3C Link Checker	Integrity
Free Free to use on the W3C website.	Freemium Integrity is free; Integrity Plus ($20), Integrity Pro ($59) and Scrutiny ($149) are paid…
Web	macOS
Checks anchors as well as full URLs Recursive crawling with a configurable depth	Free link checker with no usage cap mentioned Native macOS app
Plain interface with a text-heavy report Works best when the pages already have valid markup	Mac only Export, search and sitemaps require a paid version
Web application	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Needs internet	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.