JWT Decoder
Decode JWT tokens — view header, payload, and expiration status
About JWT Decoder
Decode JWT tokens to inspect the header, payload, and expiration status without needing any secret key. Useful for debugging authentication flows. Runs entirely in your browser.
- ·Decodes header and payload with formatted JSON output
- ·Shows expiration status and timestamps
- ·No secret key required for decoding
- ·Runs entirely in your browser — tokens never leave your device
JWT Decoder FAQ
Do I need a secret key to decode?▼
No. JWT decoding only reads the base64-encoded header and payload. Verification (checking the signature) requires the key, but decoding does not.
Is it safe to paste my JWT here?▼
Yes. The token is decoded locally in your browser and is never sent to any server. However, avoid sharing JWTs publicly as they may contain sensitive claims.
Can it verify the signature?▼
This tool decodes and displays the token contents. Signature verification requires the signing key and is not supported here.
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