JWT Decoder
Decode and inspect JSON Web Token headers and payloads. See expiry status and remaining time instantly.
JWT Token
What is a JWT?
JSON Web Tokens are three Base64URL-encoded sections: Header, Payload, and Signature, separated by dots.
Expiry Check
We check the
exp claim and show remaining time or an expired warning instantly.Read-Only
This tool only decodes — it never verifies or signs. Your token never leaves the browser.