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

🚄 FASTJSON2 is a Java JSON library with excellent performance.

simplejson is a simple, fast, extensible JSON encoder/decoder for Python

Alba is a JSON serializer for Ruby, JRuby and TruffleRuby.

Shale is a Ruby object mapper and serializer for JSON, YAML, TOML, CSV and XML. It allows you to parse JSON, YAML, TOML, CSV and XML data and convert it into Ruby data structures, as well as serialize data structures into JSON, YAML, TOML, CSV or XML.

A CLI tool to help generate dart classes from json returned from API

Elixir library to render Json with relationship

C JSON parser (both, SAX-like & full DOM)

An F# JSON parser & serializer

A fast json serializer

Fast lightweight and compact JSON serializer for .NET. Distributed as .NET library and C# source code.

Automatically convert JSON to dart objects in runtime without code generation.

YAML and JSON parser, serializer and deserializer with YAML to JSON and vice versa conversion tools containing pure Object Pascal source code for both Delphi and Lazarus

Lightweight embedded JSON mapper for C — structured data-to-JSON mapping with declarative macros. ThreadX/FreeRTOS/baremetal ready.

A lightweight and efficient C++20 JSON library.

Serialize any Ruby object as readable JSON

Mutils is a collection of utilities microservices

A library for Classic ASP(VBScript) to make your code more like VB.NET. It includes a typed ArrayList with Linq-like methods, O/R mapper, JSON-serializer and etc.

Single file Json parser and serializer

An exceptionally fast, stream-oriented, header-only C++ JSON serialization library.