Security

Tokens, signatures and keys, with best-practice warnings. · 4 tools

CSP and security headers

Build a Content-Security-Policy, review its flaws and export the headers for nginx, Apache, Netlify or Caddy.

Hash / HMAC

Compute SHA-256, SHA-512 and HMAC of a text or file, and compare with an expected hash.

JWT

Decode, verify and create JSON Web Tokens with security warnings.

PEM / X.509

Decode PEM certificates, CSRs and public keys: subject, validity, SAN, fingerprints and ASN.1 tree.
Encoding Formatters Converters Web design APIs Generators Text