Client-side decoder

jwt-inspector

Paste a JWT to inspect header, payload, and claims. Nothing leaves your browser.

Generator

Algorithm

Payload (JSON)

Secret

The secret is used locally via the Web Crypto API. It never leaves your browser.

Buy — $9.00 in USDC on Base

Or send 9.00 USDC (Base) to 0xf9D448615e4217b20fdC07A69Cc292cF4B71E512