Security & Encryption
Password tools, JWT, hashes, HMAC, RSA, AES — all client-side.
Analyze password entropy, length and character variety with instant strength rating.
Compute the exact Shannon entropy in bits for any password.
Generate XKCD-style diceware passphrases with adjustable word count and separators.
Decode and inspect any JSON Web Token header, payload and signature.
Inspect JWT claims, expiry, issuer and signing algorithm with validation hints.
Generate the MD5 hash of any text or file — instant, in-browser.
Generate SHA-256 cryptographic hashes for any text via WebCrypto.
Generate bcrypt-style stretched password hashes using PBKDF2-SHA-256.
Generate HMAC signatures (SHA-256/384/512) for message authentication.
Generate cryptographically random API keys, tokens and secrets of any length.
Generate RSA public/private key pairs (2048/3072/4096-bit) using WebCrypto.
Encrypt text with AES-GCM 256-bit using a password-derived key (PBKDF2).
Decrypt AES-GCM 256-bit ciphertext produced by the AES Encryptor.