JWT Decoder

JWT Decoder is a free and open-source tool designed to decode and verify JSON Web Tokens (JWTs) online. This tool provides a simple and secure way to inspect the contents of JWTs without sending your tokens to a server.

What is a JWT?

A JSON Web Token (JWT) is a compact and self-contained way for securely transmitting information between parties as a JSON object. This information can be verified and trusted because it is digitally signed. JWTs can be signed using a secret (with the HMAC algorithm) or a public/private key pair using RSA or ECDSA.

How to Use the JWT Decoder

Paste your JWT into the "JWT Token" text area.
Click the "Decode JWT" button.
The decoded header and payload will be displayed in separate text areas.
You can copy the decoded header or payload using the "Copy" buttons next to each text area.

Security Note

This JWT decoder operates entirely in your browser. Your token is never sent to our server, ensuring the security and privacy of your data.

Features

Decode JWT tokens
Display decoded header and payload
Copy decoded information to clipboard
Client-side processing for enhanced security

Remember, while this tool decodes JWTs, it does not verify signatures or check token validity. Always ensure you're using secure methods to handle JWTs in your applications.