MessagePack ↔ JSON Converter

Paste hexadecimal MessagePack in the first box and select MessagePack to JSON.
Paste JSON in the second box and select JSON to MessagePack.

How it works

Example

81a161cb3ff0000000000000

MessagePack is a binary serialization format for exchanging data between languages. Small integers use a single byte, and short strings add little overhead. Size and speed depend on the data and implementation.

{"compact":true,"schema":0}

In this example, the JSON representation uses 27 bytes and MessagePack uses 18 bytes.

Binary MessagePack is not directly readable as text. This tool represents its bytes as hexadecimal. See also Hex encoding .

MessagePack documentation

MessagePack, JSON and XML

Property	Msgpack	JSON	XML
Format	Binary	Text	Text
Payload size	Often smaller	Moderate	Often larger
Encoding efficiency	High	Moderate	Low
Readability	Requires a decoder	Human-readable	Human-readable markup
Language support	Available in many languages	Widely supported	Widely supported
Extensibility	Flexible structures	Objects and arrays	Custom tags and document structures
Typical uses	Compact storage and service communication	APIs and data exchange	Documents and configuration
Parsing speed	Depends on implementation	Depends on implementation	Depends on implementation
Complexity	Relatively simple	Simple	More complex

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