JWT Generator

Generate JSON Web Tokens with custom payloads and signing.

Runs entirely in your browser

How it works

Generate signed JWTs in three simple steps.

1

Configure your token

Set your secret key, algorithm, payload, and expiry time.

2

Generate

Click generate to create a signed JWT using the Web Crypto API.

3

Copy the token

Copy the JWT and verify the decoded header and payload.

Why use KepTools for JWT?

Instant generation

Generate signed JWTs instantly using the Web Crypto API.

100% private

Your secret key never leaves your browser. All signing happens locally.

Multiple algorithms

Support for HS256, HS384, and HS512 HMAC signing algorithms.

No account needed

Just open the page and start generating. No sign-ups or logins required.