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Xenu's Link Sleuth vs W3C Link Checker: catalog facts
Xenu's Link Sleuth	W3C Link Checker
Free Free to download and use.	Free Free to use on the W3C website.
Windows	Web
Checks links, images, scripts and style sheets Re-checks failures and reports redirects	Checks anchors as well as full URLs Recursive crawling with a configurable depth
Windows only, with no plans for other platforms Dated interface and limited development	Plain interface with a text-heavy report Works best when the pages already have valid markup
Downloadable app	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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