TOOL
MessagePack Decode
MessagePack Decode — pure client-side tool. Decodes real MessagePack binary (hex or base64 input, auto-detected) to pretty JSON. Full official spec: fixints, str/bin/array/map (fix + 8/16/32), ext (fixext1-16, ext8/16/32), float32/64, uint/int 8-64. Privacy-first, no server round-trip.
Try an example:
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How to use
- Type or paste your input into the input box.
- Adjust any parameters if needed.
- Copy or download the result.
Frequently asked questions
- Is my data uploaded anywhere?
- No. All processing happens locally in your browser with no server round-trip.
- Does this tool work offline?
- Yes. Once the page loads, the tool runs entirely client-side and needs no network connection.
Glossary terms
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