Decode JWT header and payload locally — no signature verification.
Paste a JSON Web Token to inspect its Base64URL-decoded header and payload. Expiry and issued-at claims are shown as readable dates. Decoding is local; signatures are never verified.
No. This tool only decodes the header and payload. Never treat a decoded token as trusted without verifying the signature on your server.
No. Decoding happens in your browser. Prefer test tokens when possible, and avoid pasting production secrets into any third-party site.
No. JWT Decoder runs in your browser, so your data stays on your device.
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