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JWT Decoder

Inspect and debug JSON Web Tokens payloads.

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Algorithm

—

Claims

—

Expiration

—

Diagnosis

6 warnings

JWT Token

Token

Public key (PEM)

Header

Payload

Featured claims

Decode a token to see the claims.

Humanized dates

Decode a token to see the dates.

Diagnosis

Algorithm not specified

Missing exp (expiration)

Missing iat (issued at)

Missing nbf (not before)

Missing iss (issuer)

Missing aud (audience)

§ How to use

Inspect a JSON Web Token's header and payload locally — the token never leaves your browser.

Paste the token
Paste the JWT. It is decoded locally — we never transmit or store your token.
Read header and payload
View the decoded header and payload as formatted JSON, with claims like exp and iat highlighted.
Check expiry
See whether the token is expired based on its exp claim. (Signature is not verified client-side.)