HelperCrate

JWT Decoder

Decode JSON Web Tokens to inspect their header, payload and expiry — entirely in your browser.

Your files never leave your device. Everything runs in your browser.

Related tools

Password Generator

Create strong random passwords with full control over the character set.

Password Strength

See how long it would take to crack any password and what to improve.

File Checksum

Hash any file with SHA-1, SHA-256, SHA-384 or SHA-512 using SubtleCrypto.

Text Encrypt / Decrypt

Encrypt or decrypt text with a passphrase using AES-GCM (PBKDF2 key derivation).