Audit and generate production security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, COOP, CORP).
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Toggle HSTS, CSP, X-Frame-Options, Referrer-Policy, and COOP isolation flags.
Verify your server security rating (Grade A+, A, B) based on enabled directives.
Copy ready-to-paste configurations for Next.js, Nginx, Apache, Caddy, or Cloudflare.
HSTS preload registers your domain on browser-enforced HTTPS lists maintained by Google and Mozilla, guaranteeing connections never start with unencrypted HTTP.
COOP (Cross-Origin Opener Policy) prevents malicious cross-origin popups from accessing your window object. CORP (Cross-Origin Resource Policy) prevents unauthorized sites from embedding your protected media and API responses.
Copy the exported 'headers()' async function from the Code tab into your project's next.config.ts or next.config.mjs file.
Zero-egress companion tools in the Security & Network suite
Audit CSP, HSTS, X-Frame-Options, and security headers with OWASP grading (A+ to F).
Measure cryptographic randomness, Shannon entropy (0-8 bits/byte), Chi-square test, and byte distributions.
Generate secure RFC 6238 Base32 TOTP secret keys and standard otpauth:// URIs for Google Authenticator.
Construct and validate HTTP CSP headers and meta tags.
