JWT Decoder
Decode and inspect JSON Web Tokens (JWT) instantly. Paste any JWT to see the decoded header, payload, and signature section — with pretty-printed JSON and claim explanations (exp, iat, sub, iss, aud).
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Is it safe to paste my JWT here?
Decoding happens 100% in your browser — your token never leaves your machine. That said, treat JWTs like passwords; avoid pasting production tokens in shared environments.
Can this verify the signature?
No — verifying requires the secret key. This tool only decodes the Base64URL-encoded header and payload, which requires no secret.