Security Headers
Grade your site on the HTTP headers that stop common attacks.
About Security Headers
Security Headers, created by Scott Helme, scans any site and grades its HTTP response headers: CSP, HSTS, frame options and friends. It is free and the fastest way to spot missing browser-level protections.
Best for: Use this when you want a one-minute check that your site sends the protective headers it should.
Pros
- Instant scan with a clear letter grade
- Explains what each missing header would protect against
- Free with no account
Cons
- Headers are one layer, a good grade is not a security audit
- CSP quality is hard to judge from presence alone
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