Awesome JSON

A curated list of awesome JSON libraries and resources.

Inspired by the awesome list.

Awesome JSON

Applications

OS X

Visual JSON (github) - simple JSON pretty-viewer for Mac OS X.
JSONExport - convert a object to a class of one of the currently supported languages.

Binary Serialization

BSON - Binary JSON.
MessagePack - An extremely efficient object serialization library.
UBJSON - The universally compatible format specification for binary JSON.
CBOR - Concise Binary Object Representation.
PSON - Protocol JSON, super efficient binary serialization format.

Browser Extensions

Chrome

JSON Formatter (github) - Makes JSON easy to read. Open source.
JSON Viewer (github) - It is a Chrome extension for printing JSON and JSONP.
JSON Browser (github) - Browse a JSON web with the help of JSON schemas.
JSON Finder (github) - Browse like you do it in Finder.
JSON Viewer Awesome - An open source Chrome extension for browsing JSON with syntax highlighting and folding, or as a visual graph.

Firefox

JSONView (github) - View JSON documents in the browser.

Safari

JSONAce (github) - Formats & syntax highlights JSON viewed inside of the web browser using the ACE editor.
JSONView (github) - A port of the JSONView Firefox extension that formats and syntax highlights JSON viewed inside of the browser

Command-line tools

fx - A interactive terminal tool.
jsoncat - Pretty-print Json in terminal with colors and adjusting tabs size.
jq - A lightweight and flexible command-line JSON processor.
json - A "json" command for massaging JSON on your Unix command line.
jshon - A parser designed for maximum convenience within the shell.
jarg - Shorthand JSON and form encoding syntax in the shell.
jsawk - Like awk, but for JSON.
json-dotenv - Manipulate and extract envfiles in json format.
gron - Convert a JSON file into discrete assignments that are greppable.
jid - Incremental Digger. Drill down JSON interactively by using filtering queries like jq.
jiq - It's jid with jq. You can drill down interactively by using jq filtering queries.
jv - jv (for jsonviewer) helps you view your JSON.
jl - Functional sed for JSON.

Databases

MongoDB - an open-source document database, and the leading NoSQL database.
RethinkDB - An open-source distributed document database with a pleasant and powerful query language.
EJDB - Embedded JSON Database engine published under MIT license. (C)
lowdb - Flat file database built on lodash API. (Javascript)
Lawnchair - A lightweight clientside document store. (Javascript)
JSON ODM - Object document mapper for JavaScript to use on the server or in the browser. (Javascript)
JSON Server - Get a full fake REST API with zero coding in less than 30 seconds.
Kinto - A lightweight JSON storage service with synchronisation and sharing abilities.
CouchDB - Seamless multi-master sync, that scales from Big Data to Mobile, with an Intuitive HTTP/JSON API and designed for Reliability.
RxDB - Event-driven JSON-Database with JSON-Schema, mango-Query and CouchDB-sync. (Javascript)
JSONlite - A simple, self-contained, serverless, zero-configuration, json document store. (Bash)

Datasets

country.io - Various country related datasets, as JSON inc currency, country codes, names and more
countries - World countries.
vat-rates - VAT rates for all EU countries.
MTG JSON - Up to date Magic the Gathering card data.
Heartstone JSON - Up to date Hearthstone card data.
getCountries() - Generator for custom Countries data.

Data modeling

JSONModel - Magical Data Modelling Framework. (Objective-C)

Data generation

jsonymize - Reads data from standard input, anonymizes, then writes to standard output.
dyson - Server for dynamic, fake JSON. (node.js)

Differencing

JSONPatch - A format for describing changes to a document.
JSON-Patch - Lean and mean Javascript implementation of the JSON-Patch standard (RFC 6902). (Javascript)
jiff - JSON Patch and diff based on rfc6902. (Javascript)
json-patch-php - implementation of JSON-patch (IETF RFC 6902) (PHP)
dffptch - A micro library for diffing and patching using a compact diff format. (Javascript)
jsondiffpatch - Diff & patch for JavaScript objects. (Javascript)

Editors

JSONEdit - User friendly, visual editor built as an AngularJS directive.

Format Extensions

GeoJSON - A geospatial data interchange format.
JSON-LD - A lightweight Linked Data format.
JSON-RPC - A stateless, light-weight remote procedure call (RPC) protocol.
JSONP - Safer cross-domain Ajax with JSON-P/JSONP.
JsonML - A compact format for transporting XML-based markup as JSON which allows it to be losslessly converted back to its original form.
JSON5 - a extension that aims to make it easier for humans to write and maintain by hand.
JSON6 - JSON for Humans (ES6).
JSON Resume - The open source initiative to create standard for resumes.
JSON Web Tokens - A compact URL-safe means of representing claims to be transferred between two parties.
JSON API - A standard for building APIs.
Collection+JSON - A read/write hypermedia-type designed to support management and querying of simple collections.
hal-json - A set of conventions for expressing hyperlinks in either JSON or XML.
JSON Activity Streams - A format for syndicating social activities around the web.
JSON-stat - Simple lightweight format for data dissemination.
/contribute.json - Making open source contribution information easier to access, across projects.
JSON Table Schema - a simple schema for tabular data
NDJSON (Newline delimited JSON) - a standard for delimiting JSON in stream protocols.
survey.js - JSON based survey library.
JSON Meta Application Protocol (JMAP) - A protocol for synchronising JSON-based data objects efficiently, with support for push and out-of-band binary data upload/download.
J_ackSON: JSON secret keeper - JSONic way of storing secrets in config file.

Frontend components

JSON editor jQuery plugin - component for you web apps/pages. (jQuery)
jqTree - Widget for displaying a tree structure in html. (jQuery)
jsTree - jquery plugin, that provides interactive trees. (jQuery)
Dynatable.js - A funner, semantic, HTML5+JSON, interactive table plugin. (jQuery)
JSON Formatter - Angular directive for collapsible JSON in HTML. (AngularJS)
react-jsonschema-form - A React component for building Web forms from JSON Schema. (React)

Libraries

Jansson - A C library for encoding, decoding and manipulating data.
jsmn - A minimalistic parser in C. It can be easily integrated into the resource-limited projects or embedded systems.

C++

ArduinoJson - An efficient library for embedded systems.
JSON++ - A self contained Flex/Bison parser for C++11.
json11 - A tiny library for C++11.
RapidJSON - A fast JSON parser/generator for C++ with both SAX/DOM style API

Clojure

data.json - parser/generator to/from Clojure data structures.

Fortran

JSON-Fortran - A Fortran library for writing, reading, and manipulating JSON files and data structures.

Haskell

aeson-qq - JSON quasiquoter for Haskell.
json-schema - JSON Schema library for Haskell
hjsonschema - JSON Schema Draft 4 library for Haskell

Java

JSON-java - A reference implementation.
Fast JSON Processor
Gson - A Java library to convert JSON to Java objects and vice-versa.
Jackson - A multi-purpose Java library for processing JSON data format.
moshi - A modern JSON library for Android and Java.

Javascript

JSON-js - JSON in JavaScript.
JSON 3 - A modern implementation.
oboe.js - A streaming approach, speeds up web applications by providing parsed objects before the response completes.

Objective-C

JSONKit - Objective-C library.
SBJson - Parse one or more chunks of data.

Perl

JSON::Tiny - Perl module for encoding and decoding JSON in a minimalistic way.

PL/SQL

PL/JSON - A generic JSON object written in PL/SQL.

PHP

Webmozart JSON - A robust decoder/encoder with support for schema validation.

Python

simplejson - A simple, fast, extensible encoder/decoder
jsonpickle - Library for serializing any arbitrary object graph.
metamagic.json - An ultra-fast Python 3 implementation of a JSON encoder.

Ruby

oj - A fast JSON parser and Object marshaller as a Ruby gem.
MultiJSON - A generic swappable back-end for JSON handling.

React

json2react - Use JSON to create React Stateless Components.

.NET

jsonfx - serialization framework for .NET.

Scala

spray-json - A lightweight, clean and simple implementation in Scala.
circe - Yet another JSON library for Scala.
scala-jsonapi - Support library for integrating the JSON:API spec with Play, Spray and/or Circe backends.
jsoniter-scala - Scala macros for compile-time generation of ultra-fast JSON codecs.

Swift

SwiftyJSON - The better way to deal with data in Swift.

Linters

jsonlint - Parser and validator with a CLI. (Javascript)
JSON Lint - PHP linter. (PHP)

Online tools

JSONLint - The JSON Validator.
JSONCompare - The Advanced Version of the JSON Linter.
JSONMate - JSON editor, inspector and beautifier.
JSON Editor online - A web-based tool to view, edit and format.
Collapsible JSON Formatter - Formatter and Colorer of Raw Code.
JSON Formatter and Validator - Formatter to help with debugging.
JSON Generator - Tool for generating random data.
FakeJSON - Web API to quickly generate fake data for your application.
JSON to CSV - A free, in-browser JSON to CSV converter.
CSV to JSON - Easy, privacy-friendly and offline-first online csv to json converter
json2csharp - Generate c# classes from a json string or url.
JSON Utils - Site for generating C#, VB.Net, and Javascript classes from JSON.
geojson.io - Simply edit GeoJSON map data.
jq play - A playground for jq.
json2yaml - Convert JSON to YAML online.
JSON Selector Generator - A simple GUI for generating the selectors to access.
JSON.fr - Fully client-side validator and formatter.
ObjGen - Online live JSON generator.
JsonStub - Online JSON faker.
JSONPlaceholder - Fake Online REST API for Testing and Prototyping.
Extends Class - Diff tool to compare two files.
JSON Schema Validate API - A simple and free JSON Schema Validation API.

Schema Specifications

JSON Schema - a JSON based format for defining the structure of JSON data.
Itemscript - Language for validating and specifying values.
Kwalify - A parser, schema validator, and data binding tool
Rx - Simple, Extensible Schemata.

Services

Exchange Rate API - A simple and free API for currency exchange rate data.
ipinfo.io - JSON IP and GeoIP REST API.
JSONProxy - Simple HTTP proxy that enables cross-domain requests to any JSON API.
Myjson - A simple store for your web or mobile app.
Telize - JSON IP and GeoIP REST API.
jsonpad - a simple JSON storage platform.
JSONP Proxy - A REST API allowing to get JSONP from any API.

Supersets

YAML - A human friendly data serialization standard for all programming languages.
HanSON - JSON for Humans - with unquoted identifiers, multi-line strings and comments.
μson (uson) - a shorthand for JSON.
HOCON - Human-Optimized Config Object Notation.
ASON - A semantically complete superset of JSON (draft).
TOML - A minimal configuration file format that's easy to read due to obvious semantics.
HCL - A structured configuration language that is both human and machine friendly.

Tutorials

Introducing JSON
JSON Tutorial - An introductory tutorial on JavaScript Object Notation (JSON).
JSON - Rosetta Code - Basic operations in different languages (57 languages in this moment).
What is JSON and how to use it - Video tutorial for beginners.
jq Primer: Munging JSON Data - How jq can be used to process JSON files just as effectively as traditional Unix tools.

Related formats

AXON - A simple text based format for interchanging of objects, documents and data. It tries to combine the best of JSON, XML and YAML.
CSON - CoffeeScript-Object-Notation. JSON for CoffeeScript objects.
MSON - Markdown syntax compatible with describing JSON and JSON Schema.
ArchieML - Structured text format optimized for human writability.

Resources

Type-o-rama - JS type systems interportability, comparison of different JS type systems and conversion between them.
Awesome jq - A curated list of awesome jq tools and resources.

Templates

Jsonnet - A domain specific configuration language that helps you define JSON data.
rabl - General ruby templating with json, bson, xml, plist and msgpack support. (Ruby)
json2html - HTML templating library with wrappers for both jQuery and Node.js. (Javascript)

Testing

JSON Test - Testing platform for services utilizing JavaScript Object Notation (JSON).
JSONassert - Write JSON unit tests in less code. Great for testing REST interfaces. (Java)
JsonUnit - A library that simplifies JSON comparison in unit tests. It's strongly inspired by XmlUnit.

Text Editor Plugins

Emacs

JSON Reformat - Reformat tool.

Vim

vim-json - A better JSON for Vim: distinct highlighting of keywords vs values, JSON-specific (non-JS) warnings, quote concealing. Pathogen-friendly.

Transformations

json-sharp - Javascript tool to process operations on pure JSON objects. (Javascript)
json2json - Transform (reformat) structures from one to another. (Javascript)
trans - The ultimate object transformer. (Javascript)
osmtogeojson - Converts OSM data to GeoJSON. (Javascript)
fast-xml-parser - Fast XML to JSON and vice versa javascript/JSON conversion.
x2js - XML to JSON and vice versa javascript conversion functions. (Javascript)
JSONC - JSON compressor and decompressor. (Javascript)
JsonMapper - Map nested structures onto PHP classes (PHP)
SassyJSON - Sass-powered API. (Sass)
json.human.js - A small library to convert a JSON object into a human readable HTML representation that is easy to style for different purposes.
JSONtoFoundation - OS X utility that converts a JSON object to a Foundation object that can be used in Cocoa/Cocoa Touch development. (Swift)
fanci - Extract, rename and transform JSON based on a template. (node.js)
Pinch - String.replace for JavaScript objects. (Javascript)
deepjson - A better way to load big json config files. (node.js)
jsontl - allow transformation using a JSON-based transformation language. (node.js)
json-transforms - A recursive, pattern-matching, approach to transforming JSON structures.
normalizr - Normalizes nested JSON according to a schema. (Javascript)
JSON-populate - Tool for populating JSON data with infinitely recursive circular references. Sort of like Falcor, but for plain JSON.
CircularJSON - JSON does not handle circular references. Now it does.
Sawmill - JSON transformation library (Java)
nimnjs - JSON to nimn bidirectional converter.

Queries

JMESPath - A query language for JSON.
JSON Mask - Tiny language and engine for selecting specific parts of a JS object, hiding the rest. (Javascript)
JSONiq - The JSON Query Language.
ObjectPath - The agile query language for semi-structured data. (Python)
DefiantJS - Lightning-fast searches using XPath expressions, and transform using XSL. (Javascript)
JSONSelect - CSS-like selectors. (Javascript)
JSONPath - XPath implementation. (Javascript/PHP)
searchjs - A library for filtering based on a json SQL-like language.
json-rel - Transparent references in JSON.
JSONata - Query and transformation language used in Node-RED, supports function expressions.

JSON Schema Frontend components

JSON Editor - JSON Schema Based Editor. (jQuery)
angular-schema-form - Generate forms. (AngularJS)
JSON Schema View - An AngularJS directive for rendering JSON Schema in HTML (AngularJS)
Angular JSON Schema Form - Angular directive for making forms out of JSON Schema. (AngularJS)
AlpacaJS - Generates JSON Schema driven forms on top of Bootstrap, jQuery Mobile, jQuery UI and HTML (jQuery)

JSON Schema Tools

prmd - Tools and doc generation for HTTP APIs.
generate-schema - Effortlessly convert your JSON Object to JSON Schema, Mongoose Schema, or a Generic template for quick documentation / upstart.
Docson - Documentation for your types.
Orderly JSON - A textual format for describing JSON compiled into JSONSchema.
jsonschema2pojo - Generates Java types and annotates those types for data-binding with Jackson 1.x or 2.x, Gson, etc.
Matic - Build tool for generating HTML documentation.
JSON Schema + Faker - Fake your schemas.
DLL.js - Gets you a JSON Schema from PostgreSQL or SQLite3.
JSONSchema.net - JSON Schema generator from JSON object.
js-schema - A new way of describing object schemas in JavaScript. It has a clean and simple syntax, and it is capable of serializing to/from the popular JSON Schema format.
aptos - A tool for validating data using JSON Schema and converting JSON Schema documents into different data-interchange formats.
JSON Schema $Ref Parser - Parse, resolve, and dereference JSON Schema $ref pointers

JSON Schema Resources

Understanding JSON Schema - A website aiming to provide more accessible documentation for JSON schema.
JSON Schema Store - A collection of popular schemas.
Using JSON Schema - a Book and GitHub project, showing how JSON Schema can be used for a variety of tasks and in different programming contexts.

JSON Schema Validators

Javascript and Node.js

json-schema-benchmark - Performance benchmark for Node.js validators.
is-my-json-valid - A validator that uses code generation to be extremely fast.
jsen - A validator built for speed.
themis - A blazing fast validator.
jsck - JSON Schema Compiled checK.
z-schema - validator written in JavaScript for NodeJS and Browsers.
jjv - Javascript Library for Schema Validation.
request-validator - Flexible request validator middleware for express and connect.
tv4 - Tiny Validator.
ajv - The fastest validator. Supports v5/6 proposals.