Security & Cryptography

Create strong, random passwords with custom rules.

Generate MD5, SHA-1, SHA-2 and SHA-3 hashes from any text.

Hash passwords with Argon2id, bcrypt or scrypt using a salt.

Generate random tokens, API keys and secrets in bulk.

Decode a JSON Web Token to inspect its header and payload.

Create a signed JSON Web Token with HMAC (HS256/384/512).

Encrypt and decrypt text with a password using AES-256-GCM.

Generate an HMAC signature from a message and secret key.

Check password strength with entropy and estimated crack time.

Encode text to Base32 and decode Base32 back to text.

Generate memorable, secure passphrases from random words.

Generate time-based one-time passcodes from a Base32 secret.

Generate an RSA public and private key pair in PEM format.

Check whether a password matches a bcrypt hash.

Encode text to Base58 and decode Base58 back to text.

Encode and decode text with a keyword-based Vigenere cipher.

Identify the likely type of a hash from its format.

Verify a JWT's HMAC signature and check its claims.

Compute MD5, SHA-1, SHA-256 and SHA-512 checksums of a file.

Generate an ECDSA public and private key pair in PEM format.

Generate a random AES key in hex and Base64.

Generate secure random bytes in hex, Base64 or decimal.

Encode and decode Base64URL, the URL-safe Base64 variant.

Generate a deterministic namespace UUID (version 5).

Encode or decode text with a Caesar shift cipher, including the popular ROT13.