Security & Crypto Tools
Free online security and cryptography tools — decode JWTs, generate MD5/SHA-256 hashes, create strong passwords and UUIDs, and encrypt with AES or bcrypt. Everything runs locally in your browser, so secrets never leave your machine.
8 tools · free · no sign-up
JWT Decoder
Inspect header, payload & verify HMAC signatures
Hash Generator
MD5, SHA-1, SHA-256, SHA-384 & SHA-512 + HMAC
Password Generator
Strong, configurable random secrets
UUID / GUID Generator
Cryptographically random v4 UUIDs and GUIDs in bulk
ROT13
ROT13 and ROT47 cipher encode/decode
AES Encrypt / Decrypt
AES symmetric encryption in the browser
XOR Encrypt / Decrypt
Simple XOR bitwise encryption
bcrypt Generator
Hash and verify bcrypt passwords