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Webbkoll vs Security Headers: catalog facts
Webbkoll	Security Headers
Free Free to use, run by a non-profit foundation.	Free Free to scan sites in the browser.
Web	Web
Covers cookies, third parties, HTTPS and security headers in one report Checks HTTP to HTTPS redirects	Simple A+ to F grade that is easy to share Option to hide results and follow redirects
Some sites fail to scan correctly Simulates a single default browser visit	Scans appear in a public recent list unless hidden Covers headers only, not TLS or application flaws
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Needs internet	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.