JWT Decoder
Workspace
This workspace processes the content directly in your browser.
Formatting, decoding, validation, and common file work stay local whenever possible, then continue in the same result area for copy, download, or the next step.
Paste content, choose a file, or load a sample first.
The content stays in the local browser by default.
After processing, copy, download, or continue into a related workflow.
Input
Decoding always runs locally. If you enter an HMAC secret, the page can verify HS256 / HS384 / HS512 signatures in the browser.
Decoded result
Header, payload, and timing claims will appear here.
Decode JWT header and payload locally to inspect claims, timestamps and Base64URL segments without sending the token away.
Common tasks
- Inspect test tokens during development
- Check exp / iat / iss / sub claims quickly
- Explain what a copied JWT contains before debugging auth flows
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Key Questions
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