JWT Decoder

How to use JWT Decoder

1. 1

   Paste a JWT (the three dot-separated Base64URL segments) into the input field.

2. 2

   The tool splits and decodes the header and payload segments and displays them as readable JSON.

3. 3

   Check the payload for standard claims like exp (expiry), iat (issued at), and sub (subject) to inspect the token's contents.

Common use cases

• •Debugging why an API call is rejected with an auth error by inspecting the token's claims
• •Checking whether a token has expired without writing a decoding script
• •Verifying that a backend is issuing the expected claims during development

Frequently asked questions