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muffetDeadFinder
Free

Free and open source.

 Free

Free and open source under the MIT license.

Windows, macOS, Linux, Command line Command line
  • Fast concurrent crawling
  • Fits easily into CI pipelines
  • Scans pages, URL lists, and sitemaps
  • Offers several structured output formats
  • Command line only, no graphical interface
  • Focused on links rather than wider SEO or markup checks
  • Command-line tool
  • Checking links requires network access
Downloadable app Downloadable app
Open source Open source
License not stated License: MIT
No account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 23, 2026

Checked October 8, 2026

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