Toolinium
JWT Decoder Tool
Status: -
Expiry: -
Secure Decode
Expiry Check
JSON View
Instant Result
About JWT Decoder
JWT Decoder Tool decodes JSON Web Tokens to reveal the header and payload, and checks whether the token has expired — all locally in your browser. It's a fast way to inspect what's inside an access token or ID token while debugging authentication flows.
How To Use
- Paste your JWT token into the input field
- Click Decode to view the header and payload as formatted JSON
- Check the status bar for validity and expiry time
- Copy the header or payload individually with one click
Frequently Asked Questions
Is this tool free?
Yes! JWT Decoder is 100% free with no registration required.
Does it verify the token's signature?
No, this tool only decodes the header and payload — it does not verify the signature against a secret or public key.
Is my token stored or sent anywhere?
No, decoding happens entirely in your browser and the token never leaves your device.
Is it safe to paste a production token here?
Yes, since everything runs locally, but as good practice avoid sharing tokens with anyone else or pasting them into untrusted tools.