JWT Decoder
Decode JWT header and payload.
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How it works
- Paste a JWT.
- Click Decode.
- Inspect header, payload, and signature.
Features
- Base64URL decoding
- Pretty-printed JSON claims
- No signature verification
- Browser-only
FAQ
Does this verify signatures?
No. It only decodes. Never treat decoded claims as trusted without verification.
Is my token uploaded?
No. Decoding runs locally in your browser.