Decode a sample payload
token = eyJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJ0ZXN0Iiwic3ViIjoidXNlcjEyMyIsImV4cCI6OTk5OTk5OTk5OSwidGltZSI6MTcwMDAwMDAwMH0.xxx
Result: {"iss":"test","sub":"user123","exp":9999999999}
JWT Payload Decoder
Extract and decode the JWT payload to see all claims (subject, issuer, expiration, custom data). Runs entirely in your browser.
Privacy: this tool processes your data entirely in your browser. Nothing you paste or type is sent to the server.
Enter your values and press Calculate — the result appears here.
Worked examples
Frequently asked questions
Is the payload encrypted?
No. JWT payloads are Base64URL-encoded, not encrypted. Anyone who has the token can decode the payload. Never put sensitive data (passwords, secrets, PII) in a JWT payload unless it is encrypted (JWE).
What standard claims might I see?
Common claims include: sub (subject/user ID), iss (issuer), aud (audience), exp (expiration time as Unix timestamp), iat (issued at), nbf (not before), and jti (unique token ID).
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