How to Decode a JWT Token
Learn how to inspect JWT tokens and understand their structure using the JWT Decoder.
Tool Used
JWT Decoder
1
Get your JWT
Copy your JWT from wherever it is stored. You will usually find it in an Authorization header, localStorage, or a cookie.
2
Open JWT Decoder
Navigate to /tools/encoding/jwt-decoder.
3
Paste the token
Paste the full JWT string (it looks like three base64-encoded strings separated by dots) into the input field.
4
Inspect the decoded parts
The tool automatically splits the token into Header, Payload, and Signature sections. The Header shows the algorithm used. The Payload shows the actual claims including user info and expiration.
5
Check expiration
The tool highlights if the token is expired based on the exp claim in the payload.
All done!
You are ready to use the JWT Decoder like a pro.