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Web Check vs Security Headers: catalog facts
Web Check	Security Headers
Free Free and open source.	Free Free to scan sites in the browser.
Web, Self-hosted	Web
Many checks combined in one report Can be self-hosted with Docker	Simple A+ to F grade that is easy to share Option to hide results and follow redirects
Running it yourself takes some setup Only looks at publicly available information	Scans appear in a public recent list unless hidden Covers headers only, not TLS or application flaws
Self-hosted	Web application
Open source	Closed source
License not stated	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.