JWT Decoder
Decode and inspect JSON Web Tokens
About JWT Decoder
Decode and inspect JSON Web Tokens without sending them to a server. View header, payload, and signature details. Check expiration times and claims. A lightweight alternative to jwt.io.
Privacy First
All processing happens entirely in your browser. No data is sent to any server, and nothing is stored. Your input stays on your device.
FAQ
What is a JWT?
A JSON Web Token (JWT) is a compact, URL-safe token format used for securely transmitting information between parties. It consists of three parts: header, payload, and signature.
Can I verify JWT signatures with this tool?
This tool decodes and displays the JWT contents but does not verify signatures. Signature verification requires the secret key or public key used to sign the token.