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

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.

A handy swift json-object serialization/deserialization library

🚄 FASTJSON2 is a Java JSON library with excellent performance.

The fastest JSON library in C

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

Python Data Structures for Humans™.

JexBoss: Jboss (and Java Deserialization Vulnerabilities) verify and EXploitation Tool

Cista is a simple, high-performance, zero-copy C++ serialization & reflection library.

🎷No ceremony, just code. Blazing fast, typesafe binary serialization.

Rust reflection, serialization, deserialization, pretty printing, etc. — the last proc macro you should need

Map nested JSON structures onto PHP classes

jsoniter (json-iterator) is fast and flexible JSON parser available in Java and Go

Rust high performance xml reader and writer

Python library for serializing any arbitrary object graph into JSON. It can take almost any Python object and turn the object into JSON. Additionally, it can reconstitute the object back into Python.

Declarative binary reading and writing: bit-level, symmetric, serialization/deserialization

Module that adds support for serialization/deserialization of Kotlin (http://kotlinlang.org) classes and data classes.