Cookie parser
Paste a single Set-Cookie header line. We decompose attributes and grade against modern best practice.
Paste a Set-Cookie header
Examples:
Auditing every cookie at once? The cookie security audit walks an entire URL and grades all cookies it sets.
Keep hardening your site
This is one check of many. Run the rest — every tool is free, no account.
Security headers scan
Grade your live response headers
TLS certificate scan
Grade chain, expiry, and key strength
Security headers builder
Emit a ready-to-paste header block
CSP analyzer
Grade your Content-Security-Policy
Cookie security audit
Check Secure, HttpOnly, SameSite
Mixed-content scanner
Find http:// assets on https pages
Open-redirect detector
Probe redirect params for abuse
HSTS preload checker
Grade against Chrome's preload list