JSON Formatter & Validator
Validate JSON and format it for reading or compact transfer.
DeveloperDeveloper tools
JWT Decoder
Read a JWT header and payload without verifying its signature.
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How to use jwt decoder
- Paste a disposable three-segment compact token into JWT token.
- Select Process input to decode the header and payload JSON.
- Read the NOT VERIFIED label and perform trust checks in the receiving application.
Work through an example
Decode a harmless three-segment token, read its JSON claims, and identify the checks that decoding cannot perform.
Inspect JWT claims without treating them as verified →Formats, privacy, and practical limits
Decoding does not verify a signature or establish trust. Never treat these decoded claims as authentication.
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Frequently asked questions
Does decoded JSON prove that a JWT is authentic?
No. The decoder does not verify the signature, algorithm policy, expiration, issuer, or audience.
Can this tool decode an encrypted five-segment token?
No. Its supported input is a three-segment compact token with JSON header and payload.