security tools

• Hash Generator

  Compute a SHA-1, SHA-256, SHA-384 or SHA-512 hash of text using the Web Crypto API, in your browser.

• JWT Decoder

  Decode a JSON Web Token to read its header and claims. Nothing is sent anywhere.

• Password Generator

  Generate a random password with your choice of length and character types, using a secure RNG.

• Password Strength Checker

  Estimate a password’s entropy and rough crack time from the character types it uses, in your browser.

• ROT13 / Caesar Cipher

  Shift letters by any amount, including the classic ROT13, entirely in your browser.

• Text Encryption

  Encrypt text with a passphrase using AES-256-GCM, entirely in your browser. Nothing is uploaded.