MessagePack ↔ JSON Converter / Viewer
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What is MessagePack ↔ JSON Converter / Viewer?
This tool converts JSON to MessagePack and decodes MessagePack back to JSON.
It is useful for APIs, binary payload inspection, backend debugging, compact serialization formats, and interoperability testing.
How to use MessagePack ↔ JSON Converter / Viewer
- Paste JSON and click JSON → MessagePack to encode it.
- Paste Base64-encoded MessagePack and click MessagePack → JSON to decode it.
- Inspect the hex output and byte size.
- Copy JSON, Base64 MessagePack, or hex output if needed.
Tips
- MessagePack is a binary format, so this tool uses Base64 for safe text input and output.
- Hex output is useful for debugging payloads and comparing binary data.
- If decoding fails, make sure the input is valid Base64-encoded MessagePack.
- This tool is useful when testing APIs or backend serializers.
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MessagePack ↔ JSON FAQ
Why does MessagePack use Base64 here?
Because MessagePack is binary, Base64 makes it easier to paste and copy safely in a text UI.
Can this tool decode MessagePack to JSON?
Yes. Paste Base64-encoded MessagePack and it will decode it into formatted JSON.
Can it encode JSON to MessagePack?
Yes. Paste JSON and the tool will return Base64 and hex representations of the MessagePack payload.
Is my data stored?
No. The tool only processes the submitted content for conversion.