JWT Decoder
Decode JSON Web Tokens instantly. View JWT header, payload, claims, expiration time and token structure directly in your browser.
Header
Decoded JWT header will appear here.
Payload
Decoded JWT payload will appear here.
How to Decode a JWT
Inspect a JSON Web Token in three simple steps.
1. Paste token
Copy your JWT and paste it into the decoder box.
2. Decode JWT
The tool separates and decodes the header and payload.
3. Review claims
Check token claims like issuer, subject, issued time and expiration.
Inspect JWT tokens for APIs and authentication flows.
This JWT Decoder helps developers debug authentication tokens, inspect token claims, read expiration dates and understand JSON Web Token structure.
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JWT Decoder FAQ
Common questions about decoding JSON Web Tokens.
What is a JWT?
A JWT, or JSON Web Token, is a compact token format often used for authentication and sending claims between systems.
Does this tool verify JWT signatures?
No. This decoder only reads the token header and payload. Signature verification requires a secret or public key.
What are JWT claims?
JWT claims are pieces of information inside the payload, such as issuer, subject, audience, issued time and expiration time.
Is this JWT Decoder free?
Yes. This online JWT Decoder is free to use.