JWT Decoder
Decode a JSON Web Token's header and payload, with expiry and issue times in plain dates.
Result
How to use
- 1
Paste your token — a “Bearer ” prefix is fine.
- 2
Read the decoded header, payload and claims.
- 3
Check whether the token has expired; the times are shown in IST and UTC.
Questions
Does this verify the signature?
No. It only decodes the token so you can read it. Anyone can decode a JWT, so a decoded token proves nothing until your server verifies its signature with the secret or public key.
Is it safe to paste my token here?
This decoder runs entirely in your browser and sends nothing. Even so, a live token is like a password — never paste one into websites you don't trust, and prefer expired or test tokens.
What are exp, iat and nbf?
They are Unix timestamps in seconds: exp is when the token expires, iat is when it was issued and nbf is the time before which it must not be accepted.
About this JWT Decoder tool
JWT Decoder — Decode a JSON Web Token's header and payload, with expiry and issue times in plain dates. It is one of 200 free tools on namasivayam.in, made by software engineer Namasivayam Vadivelan for everyday use in India.
Everything is calculated instantly in your browser: nothing you type or upload is sent to any server, there is no sign-up, and it works on mobile and desktop. Paste your token — a “Bearer ” prefix is fine.
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Results are estimates to help you plan. They are not financial, tax or medical advice.