JWT Decoder

Decode JSON Web Tokens instantly. This tool runs entirely in your browser and does not verify signatures.

Header

Payload

What is a JWT?

A JSON Web Token (JWT) is a compact, URL-safe token used for authentication and authorization between systems.

What This JWT Decoder Does

Decodes JWT header and payload
Displays formatted JSON
Shows token expiration status
Runs fully in your browser

Security Notice

This tool does not verify signatures. Never paste sensitive production secrets into online tools.