Web Security toolkit.
Open-source
Free, fast, privacy-first. Built for developers and the security community.
HTTP Security Headers Checker
Inspect any URL for missing security headers. Get severity-ranked issues and copyable fix snippets.
Open tool →CSP Builder
Build a strict Content Security Policy with a visual editor. Test against your site.
Open tool →CSP Evaluator
Audit any Content Security Policy for weaknesses, missing directives, and known bypass patterns.
Open tool →JWT Decoder
Decode and inspect JSON Web Tokens. Analyze claims and detect common security weaknesses.
Open tool →IP & WHOIS Analyzer
Geolocation, ASN, WHOIS records, and VPN/proxy detection for any IP address.