Messagepack GitHub Repositories (2026) · Open Source Tools

JSON for Modern C++

Extremely fast, in memory, serialization, reflection, and RPC library for C++. JSON, BEVE, BSON, CBOR, CSV, JSONB, MessagePack, TOML, YAML, EETF

The fastest binary serializer for C#. Source-generated, zero-allocation, thread-safe and safe on untrusted input: .NET, Native AOT, Unity, Godot and HybridCLR, with Go, Rust and TypeScript writing and reading the same bytes.

A feature-packed .NET MessagePack serialization library with great performance and simplicity. msgpack.io[C#]

A tiny MessagePack library for C++11 (msgpack.org[C++11])

A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML