Security Headers

A web service that analyses a site's HTTP response headers and grades them from A+ to F.

FreeProprietaryWeb

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About Security Headers

Security Headers, created by Scott Helme and now a Snyk project, scans a URL and grades its HTTP response headers from A+ to F. You can choose whether to follow redirects and hide results from the public recent-scans list.

The home page shows running totals of grades across hundreds of millions of scans, along with recent scans and a hall of fame and shame. An API is documented for automated checks. It suits anyone who wants a quick, widely recognised grade for a site's headers.

Strengths

  • Simple A+ to F grade that is easy to share
  • Option to hide results and follow redirects
  • Documented API for automation

Limitations

  • Scans appear in a public recent list unless hidden
  • Covers headers only, not TLS or application flaws

Details

Pricing
FreeFree to scan sites in the browser.
License
Proprietary
Developer
Snyk
Platforms
Web
How it runs
Web application
Works offline
No
Best suited for
A quick, recognisable grade for a site's security headers
Last verified
Added
Provenance
Selected from the TechWalrus Resource Hub (Website Checkers & Audit Tools); facts checked against the developer's own pages, 2 sources on file.

Report a wrong fact or a dead link on this listing