Protocol Buffers - Google's data interchange format

FlatBuffers: Memory Efficient Serialization Library

FASTJSON 2.0.x has been released, faster and more secure, recommend you upgrade.

🎒 Token-Oriented Object Notation (TOON) – compact, human-readable serialization of JSON data for LLM prompts. TypeScript SDK, CLI, benchmarks.

Cross-browser storage for all use cases, used across the web.

A high-performance 100% compatible drop-in replacement of "encoding/json"

A proof-of-concept tool for generating payloads that exploit unsafe Java object deserialization.

Fast, correct Python JSON library supporting dataclasses, datetimes, and numpy

A lightweight library for converting complex objects to and from simple Python datatypes.

Extremely Fast MessagePack Serializer for C#(.NET, .NET Core, Unity, Xamarin). / msgpack.org[C#]

Java binary serialization and cloning: fast, efficient, automatic

Static reflection for enums (to string, from string, iteration) for modern C++, work with any enum type without any macro or boilerplate code

Kotlin multiplatform / multi-format serialization

A C++11 library for serialization

A blazingly fast multi-language serialization framework for idiomatic domain objects, schema IDL, and cross-language data exchange.

🚄 FASTJSON2 is a Java JSON library with excellent performance.

Zero-copy deserialization framework for Rust

A handy swift json-object serialization/deserialization library

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

Rusty Object Notation