JWT Parser Online
Decode JWT header & payload instantly. Inspect claims like exp, iat and nbf — and optionally verify HS256/384/512 signatures — all in your browser.
JWT
Tip: If your token starts with Bearer we'll ignore it. Decoding runs locally in your browser.
Secret (optional, for HS256/384/512 verification)
Why Use Our JWT Parser?
Decode and analyze tokens locally in your browser. No uploads, no server processing.
Paste a token and get readable JSON output in milliseconds — perfect for debugging.
Pretty-printed header and payload with one-click copy for logs, docs, or code reviews.
See common claims (iss, aud, exp, iat, nbf, jti) with human-friendly timestamps.
Optionally verify HMAC signatures (HS256/HS384/HS512) using a secret — in-browser.
Desktop, tablet, or mobile. Nothing to install — just open the page and decode.
How to Decode a JWT
Paste your JWT into the input box. Tokens often look like header.payload.signature.
Click Parse JWT to decode the header and payload JSON and view common claims with timestamps.
Copy decoded JSON, or enter a secret to verify HS signatures (HS256/384/512).
Frequently Asked Questions
Is it really free to use?
Yes. Our JWT parser is completely free. No registration, no limits, and no hidden fees.
Is my token secure?
Decoding and verification run in your browser. Your token and secret are not sent to any server.
Does decoding mean the token is valid?
No. Decoding only reveals the Base64URL-encoded JSON. Authenticity requires signature verification and server-side validation.
Can this tool decrypt encrypted JWTs (JWE)?
Not currently. Encrypted tokens can show a header, but the payload is encrypted and cannot be decoded without decryption keys.
Decode JWTs in Seconds
Debug tokens faster with clear JSON output, claim timestamps, and optional HS signature verification.