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JWT Decoder

Decode JWT tokens to view their header and payload. Useful for debugging and inspection.

Runs in your browser · No data sent anywhere
JWT Token
Decoded Payload
Copied!
100%
Client-Side
0
Data Sent
HS256
Supported
∞
Uses

Header Analysis

View algorithm & type

Payload Inspector

Decode claims & data

Signature Verify

Validate token integrity

Real-Time

Decode as you type

JWT Structure

HEADER . PAYLOAD . SIGNATURE
HS256 HS384 HS512 RS256 RS384 RS512

Common JWT Claims

iss: Issuer • sub: Subject • aud: Audience • exp: Expiration • nbf: Not Before • iat: Issued At • jti: JWT ID

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Frequently Asked Questions

Can I see the expiration date of a JWT using this tool?

Yes, once decoded, the tool displays the payload, which typically includes the exp (expiration) claim.

Is it safe to decode a JWT that contains sensitive user information?

Yes, because the decoding happens entirely in your browser and no data is ever sent to a server.