Security & Crypto

Hashes, JWTs, passwords, UUIDs, and random generators.

12 tools

Generate MD5, SHA-1, SHA-256, SHA-512, and SHA-3 hashes from text or files.

Generate strong, random passwords with configurable length and character sets.

Generate RFC 4122 UUIDs (v1, v4, v5, v7) individually or in bulk.

Check the strength of a password using entropy analysis and common patterns.

Hash and verify passwords using the bcrypt algorithm securely in the browser.

Generate HMAC signatures using SHA-256, SHA-512, or MD5 with a secret key.

Generate cryptographically secure random strings, tokens, and API keys.

Generate Universally Unique Lexicographically Sortable Identifiers (ULIDs).

Generate HTTP Basic Authentication headers from username and password.

Generate RSA public/private key pairs (2048/4096-bit) in PEM format using Web Crypto API.

Encrypt and decrypt text using AES-256-GCM with PBKDF2 key derivation — all client-side.

Generate BIP39 mnemonic seed phrases (12–24 words) for cryptocurrency wallets.