Awesome JSON

A curated list of awesome JSON libraries and resources.

Inspired by the awesome list.

---

• Awesome JSON
  • Applications
  • Binary Serialization
  • Browser Extensions
  • Command-line tools
  • Databases
  • Datasets
  • Data modeling
  • Data generation
  • Differencing
  • Editors
  • Format Extensions
  • Frontend components
  • Libraries
  • Linters
  • Online tools
  • Schema Specifications
  • Services
  • Supersets
  • Related formats
  • Resources
  • Templates
  • Testing
  • Text Editor Plugins
  • Transformations
  • Tutorials
  • Queries
  • JSON Schema Frontend components
  • JSON Schema Tools
  • JSON Schema Resources
  • JSON Schema Validators
  • Contribute

Applications

• Dadroit JSON Viewer - Very fast JSON Viewer, supporting huge (multi gigabytes) files, JSON log (JSON-Lines and ndjson).

OS X

• JSON Design Studio - Professional schema authoring environment.
• Visual JSON - simple JSON pretty-viewer for Mac OS X. (inactive)
• 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.
• JSON BinPack - Space-efficient binary JSON serialization format based on JSON Schema.

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 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

• dsq - Tool for running SQL queries against JSON, CSV, Excel, Parquet, and more.
• 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.
  • jaq - A jq clone focussed on correctness, speed, and simplicity. Written in Rust.
  • gojq - Pure Go implementation of jq. A bit faster and more portable.
• JSONKit - Swiss Army knife: format, validate, query via dot-notation, diff, flatten, convert to CSV, and stats. Zero dependencies, Python 3.10+.
• livejq - An alternative jq implementation in rust for continuous parsing without crashing on invalid JSON
• json - A "json" command for massaging JSON on your Unix command line.
• json-search - A small tool to search for objects/values in json files.
• 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.
• Parsrs - CSV, XML, and data text parsers and generators written in pure POSIX shellscript. Includes parsrj.sh and makrj.sh.
• visidata - A terminal spreadsheet-like tool for interactively exploring data.
• jc - Converts the output of many CLI tools, file-types, and common strings into JSON
• logdy - jq, tail, less, grep and awk merged together and available in a clean web UI.
• jsonskim - Extract structure by collapsing arrays and truncating strings. LLM-ready output.

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.
• 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

• FrontAid CMS - Content Management System that supports arbitrary data model structures.
• JSON table editor - Display JSON array as table, provides search, filtering and edition features. It supports large files of multiple gigabytes. (Rust).
• JSONEdit - User friendly, visual editor built as an AngularJS directive.
• JSON Crack - Display your JSON as a graph

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.
• 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.
• 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.
• Sequence JSON - A proposal for a standard way of creating music sequence data in JSON.

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)

• @textea/json-viewer - A React component for JSON viewer. (React)

• ngx-formly - JSON powered / Dynamic forms for Angular

• SmarkForm - Enhance HTML forms to import/export any possible data, including arrays and subforms to any depth.

Libraries

C

• codables - Declarative, type-rich (de)serializer able to handle almost any data type.
• 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.
• json-build - A minimalistic serializer 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.
• qjson - A fast library for C++17 that is header-only.
• 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.
• FracturedJsonJs - A JSON formatter that produces human-readable but fairly compact output.
• JsonHilo - Minimal lossless parse event streaming, akin to SAX.

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

• TOON PHP Lite - Lightweight TOON encoder/decoder for human-readable, LLM-friendly structured data. (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.

Shell

• jshn - JSON parsing and generation library in for shell scripts (Ash/Bash)

Swift

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

• yyjson - High performance parser and serializer in C.

Linters

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

Online tools

• Dadroit V Web - In-browser viewer for large files with tree view, RegEx search, and URL loading with auth. Fully client-side.
• DataFormatter Pro - Browser-based formatter, validator, diff, and converter with a tree view.
• JSON Blob - An online tool to view, edit, format, and share data. Also has an API for making requests against stored blobs.
• JSON Viewer Tool - Online tool to view, format, validate, minify, and convert data in the browser.
• JSONLint - The JSON Validator.
• JSONCompare - The Advanced Version of the JSON Linter.
• JSONMaster - Free online validator, formatter, minifier and viewer.
• 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.
• JSONtapose - Intuitive, beautiful and secure client-side comparison and visualization tool.
• jsontosdk - Paste a data sample to get typed TypeScript interfaces and a Zod schema with LLM-named types. No signup.
• ObjGen - Online live JSON generator.
• 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.
• JSONPerf - A Visual, Unbiased and Up-to-Date JSON Performance Benchmark.
• FracturedJson - Formatter that produces human-readable but fairly compact output.
• Softwium - Fake and dummy REST API for testing.
• JSONing - A toolset including a formatter, comparer, JSONPath tester, patch generator, and data generator.

Schema Specifications

• JSON Model - A lightweight featureful DSL for data modeling.
• 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.
• Telize - JSON IP and GeoIP REST API.
• jsonpad - a simple JSON storage platform.

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.
• 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.

Visual Studio Code

Neovim

• nvim-jqx - Browse and query json files in neovim from the quickfix window. (Lua)

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.
• fanci - Extract, rename and transform JSON based on a template. (node.js)
• 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)

Queries

• 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

• JSON Schema CLI - Command-line interface for formatting, linting, testing, bundling, and validating schema files for local development and CI/CD pipelines.
• 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.
• 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.
• JSON Schema $Ref Parser - Parse, resolve, and dereference JSON Schema $ref pointers

JSON Schema Resources

• Learn JSON Schema - Open-source reference documentation for the schema specification.
• Understanding JSON Schema - A website aiming to provide more accessible documentation for JSON schema.
• 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.
• Awesome JSON Schema - A curated list of awesome JSON Schema resources, tutorials, tools, and more.

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 schema validator. Supports draft-04/06/07/2019-09/2020-12.

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.

Contribute

Contributions welcome! Read the contribution guidelines first.

License