JWT Decoder
Decode JSON Web Tokens and inspect their header and payload.
Header
Decoded JWT header will appear here.Payload
Decoded JWT payload will appear here.Decoding a JWT does not verify its signature or prove that the token is authentic.
About JWT Decoder
Decode a JSON Web Token and inspect its header and payload directly in your browser.
What is JWT Decoder?
A JWT, or JSON Web Token, is a compact token format commonly used to transmit claims between systems and applications.
How to use JWT Decoder
- Paste a JWT into the decoder.
- Inspect the decoded header and payload.
- Review the token claims and structure.
Common use cases
- Inspecting authentication tokens during development.
- Debugging JWT-based APIs.
- Understanding token headers and claims.
Frequently Asked Questions
Can a JWT be decoded without the secret key?
The header and payload of a JWT can generally be decoded without the signing secret. Decoding does not verify the token's signature.
Is decoding a JWT the same as verifying it?
No. Decoding reveals the encoded contents, while verification checks whether the token has a valid signature.