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LinkChecker vs Dr. Link Check: catalog facts
LinkChecker	Dr. Link Check
Free Free and open source under the GPL.	Freemium A free check is available, with paid plans for larger or repeated checks.
Windows, macOS, Linux, Command line	Web
Recursive, multithreaded crawling of whole sites Many output formats including CSV, XML, SQL and sitemap graphs	Flags links to malware and phishing sites, not only dead ones Checks resources such as images and style sheets
Command-line only, no graphical interface The PyPI release may lag behind the latest code	Requires JavaScript in the browser Larger sites need a paid plan
Downloadable app	Web application
Open source	Closed source
License: GPL	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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