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JWT Decoder

Decode and inspect JWT tokens. All processing happens in your browser.

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JWT Decoder

Decode and inspect JSON Web Tokens. All processing happens in your browser.

JWT Token
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How to Use JWT Decoder

  1. 1

    Paste your JWT

    Paste a JWT token into the input field. The token is automatically split into its three parts.

  2. 2

    Inspect the decoded parts

    View the decoded header (blue), payload (purple), and signature (green) sections with pretty-printed JSON.

  3. 3

    Check standard claims

    See descriptions for standard claims like exp, iat, iss, sub, and aud with human-readable timestamps.

  4. 4

    Verify expiry status

    Instantly see whether the token is expired and a human-readable countdown of the time remaining or elapsed.

Frequently Asked Questions

No. All decoding happens entirely in your browser using JavaScript. Your token never leaves your machine.

This tool decodes and inspects JWTs but does not verify signatures, as that requires the signing secret or public key which should remain secure.

Any standard JWT with three Base64URL-encoded parts separated by dots (header.payload.signature).

Yes. If the payload contains an exp claim, the tool shows whether the token is expired and a human-readable countdown.