JWT Generator

Creates a signed JSON Web Token (HS256) from a payload and secret.

Lilu Baba's JWT Generator creates a properly signed HS256 JSON Web Token using your browser's built-in Web Crypto API — your secret never leaves your device.

Payload (JSON)

Secret Key

How to use this tool

Enter your payload as JSON.
Enter a secret key.
A signed HS256 JWT updates instantly — generated entirely in your browser using the Web Crypto API.

Signed JWT

FAQ

JWT Generator — frequently asked questions

No — signing happens entirely in your browser using the Web Crypto API. Nothing is sent to our servers.

HS256 (HMAC with SHA-256), one of the most widely used JWT signing algorithms.