JWT Decoder
Decode and inspect a JWT's header and payload, with expiry checks — all in your browser.
About JWT Decoder
Paste a JSON Web Token to instantly decode its header and payload into readable JSON. The tool highlights issued-at, not-before and expiry times and flags expired tokens. Decoding is local — your token never leaves your device.
How to use
- 1
Paste your JWT into the box.
- 2
Read the decoded header and payload as formatted JSON.
- 3
Check the issued/expiry notes to see if the token is still valid.
- 4
Copy any section you need.
Tip: All processing is performed locally in your browser with zero loss in quality and no upload limits.
Frequently Asked Questions
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