# kawanet/msgpack-lite

Fast Pure JavaScript MessagePack Encoder and Decoder / msgpack.org[JavaScript]

Repository: https://github.com/kawanet/msgpack-lite
Canonical: https://ross.abutalabs.com/products/msgpack-lite
Homepage: https://www.npmjs.com/package/msgpack-lite
Language: JavaScript
License: MIT
License Family: permissive
Last push: 2026-09-02T14:56:56+00:00

## Health v2 (maintenance only)
Score: 100/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 100, release rhythm 100, longevity 100
- inputs: {"age_days": 4058, "days_push": 0, "days_rel": 0, "gap_med": 1, "n_releases_24m": 4}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1036, forks 132 (observed 2026-09-03T02:15:13.983650+00:00)

## What it is
A fast, pure JavaScript MessagePack encoder and decoder library for Node.js and browsers, with support for streaming encode/decode and a CLI for converting between JSON and MessagePack. It works with Buffer, Array, and Uint8Array inputs.

## Use cases
- encode javascript objects to messagepack binary format
- decode messagepack buffers back to javascript objects
- stream multiple messagepack objects to a file or socket
- convert json to messagepack from the command line
- serialize data compactly for network or storage in node.js or browser

## When to choose
- you need a fast, dependency-light MessagePack codec in JavaScript
- you need streaming encode/decode of many objects
- you need a CLI to convert between JSON and MessagePack
- you need browser and Node.js support from one library

## When to avoid
- you need JSON only - use the built-in JSON API
- you need a schema-based or typed serialization format like protobuf
- you need MessagePack extensions with custom types beyond this library's support

## Facets
- artifact type: library
- maturity: stable
- function: serialization, cli
- domain: developer-tools, apis
- platform: browser, cli, cross-platform
- tags: msgpack, messagepack, encoder, decoder, streaming, javascript, data-engineering, nodejs

## Member repositories
- kawanet/msgpack-lite (main) score 100

## Provenance
- Observed fields: from GitHub, fetched 2026-09-03T02:15:13.983650+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:04:41.103102+00:00, confidence not recorded.
  - readme: https://github.com/kawanet/msgpack-lite (fetched 2026-09-03T02:15:13.983650+00:00, sha 806b729ab52a)
  - homepage: https://www.npmjs.com/package/msgpack-lite (fetched 2026-08-29T13:05:27.109954+00:00, sha 71222c5b6b00)
  - registry_npm: https://registry.npmjs.org/msgpack-lite (fetched 2026-08-29T13:05:27.119793+00:00, sha 90a721c8a7f5)
- Data as of 2026-08-30T08:39:29.467469+00:00.