JWT decoder

Read the header and payload of a JSON Web Token, with exp/iat/nbf shown as dates.

The token stays in this browser. Decoding reads the token only — the signature is never verified, so the contents are not proof of authenticity. Up to 20,000 characters.

How to use

  1. Paste a token.
  2. Decode it.
  3. Read the header, payload, and date claims.

What it supports

Decoding only: the signature is never verified, so the contents are not proof of authenticity. The token stays in this browser. Up to 20,000 characters.

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