JWT Decoder / Encoder
Decode JWT payloads and generate unsigned or HS256 tokens.
jwttokenauth
HMAC Generator
Generate keyed HMAC digests with MD5/SHA algorithms. Sensitive input stays on your device by default.
hmaccrypto
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What this tool does
Generate keyed HMAC digests with MD5/SHA algorithms. Sensitive input stays on your device by default.
How to use HMAC Generator
- Open HMAC Generator and choose the options that match what you need.
- Generate the result instantly and review it before you copy it.
- Repeat the flow until the output matches your exact use case.
FAQ
What does HMAC Generator do?
Generate keyed HMAC digests with MD5/SHA algorithms.
Does HMAC Generator upload my data?
HMAC Generator runs locally in your browser by default, so Koiloop does not need to upload that input to a server.
Can I use HMAC Generator with sensitive information?
Yes. HMAC Generator 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.