JWT Decoder

Decode JWT header and payload sections without verifying the signature.

Input stays in browserRuns locallyNo signupFree to use

JWT token

Header

Your result will appear here.

Payload

Your result will appear here.

How to use JWT Decoder

1Paste a JWT shaped token.
2Read the decoded JSON header and payload.
3Verify the token elsewhere before trusting it.

Processing and current limits

This supported operation runs in your browser after you select an input. Free use allows 25 MB files and shares 20 completed operations per day across tools. Pro removes those product limits, but browser memory and device performance can still limit large files.

Review security and data handling and current limits before processing a sensitive or important original.

Formats and limitations

Accepts Base64 URL encoded JWT header and payload sections.

The signature, expiry, issuer, audience, and authenticity are not verified. Decoded claims can be forged.

Common uses

Inspect development token claims.
Read an expiry value.
Debug a token payload format.

Features

Frequently asked questions

Does decoding prove a token is valid?

No. Anyone can create header and payload text. Validity requires signature and claim verification by the receiving service.

Is the signature displayed?

No. The tool displays only decoded header and payload JSON.

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