Awesome JSON Awesome

A curated list of awesome JSON libraries and resources.

Inspired by the awesome list.


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 Pro (github - An open source Chrome extension for browsing JSON with syntax highlighting and folding, or as a visual graph. * Discoverable JSON (github) - Gron inspired Extension. Convert a JSON document into javascript expressions. Comes with filter, remove, find-and-replace capabilities.

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.
  • jo - A small utility to create JSON objects
  • 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.
  • oj - A fast and flexible command line JSON processor.
  • visidata - A terminal spreadsheet-like tool for interactively exploring data.


  • 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)


  • 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)


  • 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)


  • 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 1.1/JSONX - An evolved version 1.1 with format extension for humans incl. comments, unquoted and multi-line strings, optional and trailing commas and more.
  • 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.
  • JackSON: 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)
  • ngx-formly - JSON powered / Dynamic forms for Angular


C * 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. * ojc - A fast JSON parser.

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. * Nlohmann JSON - A C++11 header-only class. * RapidJSON - A fast JSON parser/generator for C++ with both SAX/DOM style API * simdjson - Parsing gigabytes of JSON per second.

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.

Go * ojg - A collection of high performance JSON processing and generating tool.

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. * essential-json - A lightweight Java library for serialization, parsing and manipulation with a clean and precise API. * dsl-json - A very fast streaming JSON library. Operates on byte arrays. * mjson - Lean JSON Library for Java, with a compact, elegant API.

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. * jsonapi-consumer - Client framework for consuming JSONAPI based APIs on the JSON API standard.

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.


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

Online tools

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.


  • 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.


  • 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.


  • 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.


  • 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.


  • 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)


  • 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.
  • JSON Parsing Test Suite - A very complete test suite and validation framework.

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.


  • 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.
  • stylops - CSS subset to JSON conversion. (node.js)


  • dasel - Query and update data structures using selectors from the command line. Comparable to jq / yq but supports JSON, YAML, TOML and XML with zero runtime dependencies.
  • 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 v⅚ proposals.

Java and Kotlin * Medeia Validator - Compliant (draft-04/06/07) and fast streaming validator written in Kotlin

PHP * JSON Schema for PHP - PHP implementation of JSON schema. * JSON Guard - A validator for JSON Schema Draft 4.

Python * jsonschema - Python implementation of jsonschema. * JSON Schema Toolkit - Programmatic building of JSON schemas (recursive field mappings) with validation, a Django JSON Field, and native PostgreSQL JSON type constraints.

Ruby * Ruby JSON Schema Validator - validating against a JSON schema conforming to JSON Schema Draft 4.


Contributions welcome! Read the contribution guidelines first.