JWT Decoder
Decode JWT header and payload locally for API and auth debugging.
Local API debugging tool
Inspect a JWT without uploading it.
Paste a token, decode the header and payload, inspect claims, and keep the signature notice clear: this tool does not verify signatures.
Decode only, not verify
This tool decodes tokens for inspection only. It does not verify the signature, issuer, audience, revocation, or trust.
What can a JWT Decoder show?
A JWT decoder helps inspect the token header, payload, and common claims such as exp, iat, and nbf while debugging API and authentication flows.
Decoding a JWT is not the same as verifying it. A decoded token can still be forged or expired unless the signature and claims are validated by the system that trusts it.
Frequently Asked Questions
Does this verify JWT signatures?
No. It decodes the header and payload only.
Is my JWT uploaded?
No. Decoding happens locally in your browser.
Can I inspect exp and iat claims?
Yes. Unix timestamp claims are shown as ISO dates when present.
Should I paste production tokens?
Avoid pasting sensitive production tokens unless you understand the risk.
Does it support Unicode claims?
Yes. UTF-8 payload content is decoded safely.
Privacy Policy
We do not collect, store, upload, or transmit tokens entered into this tool.
Terms of Use
ConvertUnlimited is provided as is. Do not rely on decoded JWT output as proof of token validity.