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JWT Decoder Online
This JWT decoder helps you inspect token headers and payload claims quickly, then generate unsigned or HS256 tokens when you need to test auth flows.
jwttokenauth
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What this tool does
This JWT decoder helps you inspect token headers and payload claims quickly, then generate unsigned or HS256 tokens when you need to test auth flows.
How to use JWT Decoder / Encoder
- Paste the JWT you want to inspect into the token input.
- Review the decoded header and payload instantly in the result panel.
- Switch to encode mode when you need to create or test a new token.
FAQ
What does JWT Decoder / Encoder do?
Decode JWT payloads and generate unsigned or HS256 tokens.
Does JWT Decoder / Encoder upload my data?
JWT Decoder / Encoder runs locally in your browser by default, so Koiloop does not need to upload that input to a server.
Can I use JWT Decoder / Encoder with sensitive information?
Yes. JWT Decoder / Encoder is designed for sensitive snippets and Koiloop does not persist that input by default.
Tool details
Signals that help people understand how this page behaves before they paste real data.
- Runs in your browser by default.
- Sensitive input is treated as local-first and is not persisted by default.
- Works directly with pasted text or typed input.