catalyst.tools
100% free
No login

Hash & Security Toolkit

Hash & Security

MD5, SHA-1, SHA-256, SHA-512 hash generator, HMAC, AES-256-GCM encryption/decryption, JWT builder, and password generator.

#hash#md5#sha256#sha512#hmac#aes#encrypt#decrypt#jwt#password

What's included in Hash & Security Toolkit

5 tools, all free and client-side — no login or data upload required.

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 cryptographic hashes from any text simultaneously — all client-side.

  • Verify file integrity by comparing checksums
  • Hash passwords for storage verification examples
  • Generate content fingerprints for caching

HMAC Generator

Compute HMAC-SHA256 and HMAC-SHA512 message authentication codes using a secret key for API request signing.

  • Sign API webhook payloads for verification
  • Implement request authentication for REST APIs
  • Validate message integrity in secure communications

AES Encrypt / Decrypt

Encrypt and decrypt text using AES-256-GCM with PBKDF2 key derivation via the browser's Web Crypto API — no data leaves your device.

  • Encrypt sensitive config values before storing
  • Securely share confidential text via messaging apps
  • Prototype AES encryption logic before coding it

JWT Builder & Signer

Construct JSON Web Tokens with custom header algorithms and payload claims, and decode any existing JWT for debugging.

  • Build test JWTs for API development and debugging
  • Inspect and decode production tokens during incidents
  • Prototype JWT-based authentication flows

Password Generator

Generate cryptographically strong passwords with custom length, character sets, symbols, and entropy display.

  • Create strong unique passwords for new accounts
  • Generate API keys and secret tokens
  • Produce password suggestions meeting specific policy rules