JWT Decoder — Inspect JSON Web Tokens Online
Free JWT decoder. Paste a JSON Web Token to read its header and payload, with expiry and issued-at times converted to readable dates.
Runs in your browser — your data is never uploaded.
Paste a JSON Web Token to see its decoded header and payload as formatted JSON. Standard time claims such as exp, iat and nbf are translated into readable dates, and the tool tells you whether the token has expired. This tool only decodes — it does not verify the signature.
How to use the JWT Decoder
- Paste the JWT.
- Read the header and payload.
- Check the expiry information.
JWT Decoder — frequently asked questions
Does this verify the signature?
No. It decodes the readable parts only. Verification requires the secret or public key and should be done on your server.
Is it safe to paste a token?
Decoding happens in your browser, but treat live tokens as secrets and prefer test tokens.
What are exp and iat?
exp is the expiry time and iat is the time the token was issued, both as Unix timestamps.
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