Security
Password generators, hash tools, and security utilities.
Password Generator
Generate strong, cryptographically secure passwords and memorable passphrases in your browser. Choose length and character types, exclude look-alike characters, or build a Diceware-style passphrase — with a live entropy-based strength meter and offline crack-time estimate. Nothing is ever uploaded.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes of any text or file, right in your browser. Compute an HMAC with a secret key, verify a downloaded file's checksum, and copy any digest — all client-side, nothing uploaded.
UUID Generator
Generate and validate UUIDs (v1, v3, v4, v5, v7) in your browser — single or in bulk up to 1000, with copy, TXT/CSV download, uppercase and hyphen toggles, RFC-4122/9562 namespace support, and a validator that explains the version, variant, and embedded timestamp. Cryptographically secure, nothing uploaded.
JWT Decoder & Verifier
Decode and understand any JSON Web Token in your browser — every header and claim explained, human-readable timestamps with a live expiry countdown, HS256 signature verification, and a plain-English security analysis (alg:none, RS256, expiry). A teaching tool, not just a decoder. Nothing is ever uploaded.