JWT Decoder & Analyzer

Decode, validate, and analyze JWTs in your browser. View header and payload, check token lifetime, run security analysis, and verify HMAC signatures. Nothing is sent to any server.

Paste a JWT or use ?token=... in the URL. Supports Bearer prefix and auto-sanitization.

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Runs in browserToken never leaves your devicePrivacy-first

Paste a JWT above or use Try Sample to explore.

You can also add ?token=... to the URL.

Decoding and verification run in your browser. Token and secret never leave your device.

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