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A curated list of awesome JSON libraries and resources.

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[ Daily / Weekly / Overview ]

May 05, 2024

Format Extensions

• Sequence JSON (⭐125) - A proposal for a standard way of creating music sequence data in JSON.

May 02, 2024

Applications

• Visual JSON (⭐301) - simple JSON pretty-viewer for Mac OS X. (inactive)

Format Extensions

• NDJSON (⭐634) (Newline delimited JSON) - a standard for delimiting JSON in stream protocols.

Transformations

• deepjson - A better way to load big json config files. (node.js)

Mar 04, 2024

Libraries

• JsonHilo (⭐27) - Minimal lossless parse event streaming, akin to SAX.

Feb 21, 2024

Applications

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

Binary Serialization

• BSON - Binary JSON.

• CBOR - Concise Binary Object Representation.

Browser Extensions

• JSON Formatter (github (⭐3.7k)) - Makes JSON easy to read. Open source.

• JSON Viewer (github (⭐3.3k)) - It is a Chrome extension for printing JSON and JSONP.

• JSON Finder (github (⭐39)) - Browse like you do it in Finder.

• JSON Viewer Pro (github (⭐526) - An open source Chrome extension for browsing JSON with syntax highlighting and folding, or as a visual graph.

• Discoverable JSON (github (⭐3)) - Gron inspired Extension. Convert a JSON document into javascript expressions. Comes with filter, remove, find-and-replace capabilities.

Command-line tools

• jq (⭐29k) - A lightweight and flexible command-line JSON processor.
  • jaq (⭐2.5k) - A jq clone focussed on correctness, speed, and simplicity. Written in Rust.
  • gojq (⭐3.1k) - Pure Go implementation of jq. A bit faster and more portable.

• livejq (⭐11) - An alternative jq implementation in rust for continuous parsing without crashing on invalid JSON

• json-search (⭐4) - A small tool to search for objects/values in json files.

• jshon - A parser designed for maximum convenience within the shell.

• jc (⭐7.6k) - Converts the output of many CLI tools, file-types, and common strings into JSON

• logdy (⭐417) - jq, tail, less, grep and awk merged together and available in a clean web UI.

Differencing

• JSONPatch - A format for describing changes to a document.

Editors

• JSON Crack - Display your JSON as a graph

Format Extensions

• survey.js - JSON based survey library.

• J_ackSON: JSON secret keeper (⭐18) - JSONic way of storing secrets in config file.

Frontend components

• @textea/json-viewer (⭐363) - A React component for JSON viewer. (React)

Libraries

• Jansson (⭐3k) - A C library for encoding, decoding and manipulating data.

• oboe.js (⭐4.8k) - A streaming approach, speeds up web applications by providing parsed objects before the response completes.

Online tools

• JSON Editor online - A web-based tool to view, edit and format.

• JSON Generator - Tool for generating random data.

• CSV to JSON - Easy, privacy-friendly and offline-first online csv to json converter

• geojson.io - Simply edit GeoJSON map data.

• ObjGen - Online live JSON generator.

Schema Specifications

• JSON Schema - a JSON based format for defining the structure of JSON data.

• Kwalify (⭐22) - A parser, schema validator, and data binding tool

• Rx - Simple, Extensible Schemata.

Services

• Telize - JSON IP and GeoIP REST API.

Tutorials

• JSON - Rosetta Code - Basic operations in different languages (57 languages in this moment).

Transformations

• nimnjs (⭐45) - JSON to nimn bidirectional converter.

Queries

• ObjectPath - The agile query language for semi-structured data. (Python)

JSON Schema Resources

• JSON Schema Store - A collection of popular schemas.

• Awesome JSON Schema (⭐101) - A curated list of awesome JSON Schema resources, tutorials, tools, and more.

JSON Schema Validators

• jsonschema (⭐4.4k) - Python implementation of jsonschema.

• Ruby JSON Schema Validator (⭐1.5k) - validating against a JSON schema conforming to JSON Schema Draft 4.

Feb 22, 2022

Binary Serialization

• JSON BinPack - Space-efficient binary JSON serialization format based on JSON Schema.

Jan 30, 2022

Libraries

• json-build (⭐33) - A minimalistic serializer in C. It can be easily integrated into the resource-limited projects or embedded systems.

Jan 15, 2022

Command-line tools

• dsq (⭐3.6k) - Tool for running SQL queries against JSON, CSV, Excel, Parquet, and more.

Aug 11, 2021

Libraries

• FracturedJsonJs - A JSON formatter that produces human-readable but fairly compact output.

• FracturedJson - A formatter that produces human-readable but fairly compact output.

Online tools

• FracturedJson - Formatter that produces human-readable but fairly compact output.

Text Editor Plugins

• FracturedJsonVsc - Formatter that produces human-readable but fairly compact output.

Jul 16, 2021

Libraries

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

May 16, 2021

Text Editor Plugins

• nvim-jqx (⭐276) - Browse and query json files in neovim from the quickfix window. (Lua)

Apr 13, 2021

Binary Serialization

• UBJSON - The universally compatible format specification for binary JSON.

Browser Extensions

• JSONAce (github (⭐72)) - Formats & syntax highlights JSON viewed inside of the web browser using the ACE editor.

• JSONView (github (⭐293)) - A port of the JSONView Firefox extension that formats and syntax highlights JSON viewed inside of the browser

Databases

• CouchDB - Seamless multi-master sync, that scales from Big Data to Mobile, with an Intuitive HTTP/JSON API and designed for Reliability.

Datasets

• getCountries() - Generator for custom Countries data.

Data modeling

• JSONModel (⭐6.9k) - Magical Data Modelling Framework. (Objective-C)

Format Extensions

• 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.

Frontend components

• Dynatable.js (⭐2.8k) - A funner, semantic, HTML5+JSON, interactive table plugin. (jQuery)

Libraries

• SBJson (⭐3.7k) - Parse one or more chunks of data.

• jsonapi-consumer (⭐6) - Client framework for consuming JSONAPI based APIs on the JSON API standard.

Online tools

• json2csharp - Generate c# classes from a json string or url.

Schema Specifications

• Itemscript - Language for validating and specifying values.

Supersets

• ASON (⭐2) - A semantically complete superset of JSON (draft).

Tutorials

• jq Primer: Munging JSON Data - How jq can be used to process JSON files just as effectively as traditional Unix tools.

Related formats

• AXON (⭐22) - A simple text based format for interchanging of objects, documents and data. It tries to combine the best of JSON, XML and YAML.

Transformations

• SassyJSON (⭐169) - Sass-powered API. (Sass)

Queries

• dasel (⭐4.9k) - Query and update data structures using selectors from the command line. Comparable to jq (⭐29k) / yq (⭐2.5k) but supports JSON, YAML, TOML and XML with zero runtime dependencies.

• JMESPath - A query language for JSON.

• JSONiq - The JSON Query Language.

• JSONata - Query and transformation language used in Node-RED, supports function expressions.

JSON Schema Validators

• ajv (⭐13k) - The fastest validator. Supports v5/6 proposals.

Jan 11, 2021

Transformations

• stylops (⭐0) - CSS subset to JSON conversion. (node.js)

Dec 25, 2020

Online tools

• JSONPerf - A Visual, Unbiased and Up-to-Date JSON Performance Benchmark.

Nov 26, 2020

Frontend components

• ngx-formly (⭐2.7k) - JSON powered / Dynamic forms for Angular

Nov 01, 2020

Command-line tools

• visidata (⭐7.4k) - A terminal spreadsheet-like tool for interactively exploring data.

Oct 07, 2020

Command-line tools

• jo (⭐4.6k) - A small utility to create JSON objects

Sep 25, 2020

Editors

• FrontAid CMS - Content Management System that supports arbitrary data model structures.

Aug 12, 2020

Libraries

• simdjson (⭐18k) - Parsing gigabytes of JSON per second.

Jun 23, 2020

Command-line tools

• oj (⭐793) - A fast and flexible command line JSON processor.

Format Extensions

• 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.

Libraries

• ojc (⭐35) - A fast JSON parser.

• ojg (⭐793) - A collection of high performance JSON processing and generating tool.

Apr 15, 2020

Libraries

• Nlohmann JSON (⭐40k) - A C++11 header-only class.

Feb 10, 2020

JSON Schema Validators

• Medeia Validator (⭐57) - Compliant (draft-04/06/07) and fast streaming validator written in Kotlin

Dec 29, 2019

Libraries

• essential-json (⭐1) - A lightweight Java library for serialization, parsing and manipulation with a clean and precise API.

• dsl-json (⭐985) - A very fast streaming JSON library. Operates on byte arrays.

• mjson (⭐81) - Lean JSON Library for Java, with a compact, elegant API.

Testing

• JSON Parsing Test Suite (⭐842) - A very complete test suite and validation framework.

Sep 27, 2019

Frontend components

• react-jsonschema-form - A React component for building Web forms from JSON Schema. (React)

Online tools

• JSONMate - JSON editor, inspector and beautifier.

Sep 02, 2019

Command-line tools

• json-dotenv (⭐8) - Manipulate and extract envfiles in json format.

Online tools

• FakeJSON - Web API to quickly generate fake data for your application.

• JSON to CSV - A free, in-browser JSON to CSV converter.

May 09, 2019

Databases

• EJDB (⭐1.4k) - Embedded JSON Database engine published under MIT license. (C)

Datasets

• MTG JSON - Up to date Magic the Gathering card data.

Format Extensions

• GeoJSON - A geospatial data interchange format.

Supersets

• YAML - A human friendly data serialization standard for all programming languages.

Transformations

• x2js (⭐995) - XML to JSON and vice versa javascript conversion functions. (Javascript)

Queries

• DefiantJS - Lightning-fast searches using XPath expressions, and transform using XSL. (Javascript)

JSON Schema Validators

• JSON Guard - A validator for JSON Schema Draft 4.

May 07, 2019

Services

• Exchange Rate API - A simple and free API for currency exchange rate data.

Nov 16, 2018

Format Extensions

• JSON API - A standard for building APIs.

Libraries

• metamagic.json - An ultra-fast Python 3 implementation of a JSON encoder.

Queries

• JSONPath - XPath implementation. (Javascript/PHP)

JSON Schema Tools

• JSON Schema $Ref Parser (⭐905) - Parse, resolve, and dereference JSON Schema $ref pointers

Nov 14, 2018

Libraries

• json-schema - JSON Schema library for Haskell

• hjsonschema - JSON Schema Draft 4 library for Haskell

Online tools

• JSON Schema Validate API - A simple and free JSON Schema Validation API.

Nov 03, 2018

Command-line tools

• fx (⭐18k) - A interactive terminal tool.

Sep 11, 2018

Command-line tools

• jl (⭐474) - Functional sed for JSON.

Resources

• Awesome jq (⭐736) - A curated list of awesome jq tools and resources.

Jul 01, 2018

Format Extensions

• JSON-RPC - A stateless, light-weight remote procedure call (RPC) protocol.

• JSON5 - a extension that aims to make it easier for humans to write and maintain by hand.

• 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.

Templates

• Jsonnet - A domain specific configuration language that helps you define JSON data.

Apr 23, 2018

Online tools

• Extends Class - Diff tool to compare two files.

Mar 04, 2018

Binary Serialization

• MessagePack - An extremely efficient object serialization library.

Datasets

• country.io - Various country related datasets, as JSON inc currency, country codes, names and more

Format Extensions

• JSONP - Safer cross-domain Ajax with JSON-P/JSONP.

Libraries

• jsmn - A minimalistic parser in C. It can be easily integrated into the resource-limited projects or embedded systems.

• RapidJSON (⭐14k) - A fast JSON parser/generator for C++ with both SAX/DOM style API

• Jackson (⭐8.8k) - A multi-purpose Java library for processing JSON data format.

• JSON 3 - A modern implementation.

Supersets

• HOCON (⭐6.1k) - Human-Optimized Config Object Notation.

Tutorials

• JSON Tutorial - An introductory tutorial on JavaScript Object Notation (JSON).

Resources

• Type-o-rama (⭐244) - JS type systems interportability, comparison of different JS type systems and conversion between them.

Transformations

• fast-xml-parser (⭐2.4k) - Fast XML to JSON and vice versa javascript/JSON conversion.

Feb 22, 2018

Transformations

• Sawmill (⭐110) - JSON transformation library (Java)

Jan 21, 2018

Libraries

• jsoniter-scala (⭐707) - Scala macros for compile-time generation of ultra-fast JSON codecs.

Sep 29, 2017

Services

• ipinfo.io - JSON IP and GeoIP REST API.

Aug 08, 2017

JSON Schema Tools

• aptos (⭐150) - A tool for validating data using JSON Schema and converting JSON Schema documents into different data-interchange formats.

Jul 18, 2017

Databases

• Lawnchair (⭐2.1k) - A lightweight clientside document store. (Javascript)

• RxDB (⭐21k) - Event-driven JSON-Database with JSON-Schema, mango-Query and CouchDB-sync. (Javascript)

Format Extensions

• JSON-LD - A lightweight Linked Data format.

• JSON6 (⭐231) - JSON for Humans (ES6).

Libraries

• scala-jsonapi (⭐107) - Support library for integrating the JSON:API spec with Play, Spray and/or Circe backends.

Online tools

• JSONLint - The JSON Validator.

• JSONCompare - The Advanced Version of the JSON Linter.

Services

• JSONProxy (⭐302) - Simple HTTP proxy that enables cross-domain requests to any JSON API.

Transformations

• JSON-populate (⭐153) - Tool for populating JSON data with infinitely recursive circular references. Sort of like Falcor, but for plain JSON.

• CircularJSON (⭐602) - JSON does not handle circular references. Now it does.

Jun 30, 2017

Command-line tools

• jiq (⭐907) - It's jid with jq. You can drill down interactively by using jq filtering queries.

• jv (⭐118) - jv (for jsonviewer) helps you view your JSON.

May 04, 2017

JSON Schema Tools

• JSONSchema.net - JSON Schema generator from JSON object.

Apr 30, 2017

JSON Schema Validators

• JSON Schema Toolkit (⭐30) - Programmatic building of JSON schemas (recursive field mappings) with validation, a Django JSON Field, and native PostgreSQL JSON type constraints.

Mar 28, 2017

Command-line tools

• jsoncat (⭐27) - Pretty-print Json in terminal with colors and adjusting tabs size.

Transformations

• json-sharp (⭐6) - Javascript tool to process operations on pure JSON objects. (Javascript)

Feb 24, 2017

Supersets

• TOML (⭐19k) - A minimal configuration file format that's easy to read due to obvious semantics.

• HCL (⭐5.1k) - A structured configuration language that is both human and machine friendly.

Feb 21, 2017

Command-line tools

• jid (⭐6.8k) - Incremental Digger. Drill down JSON interactively by using filtering queries like jq.

Databases

• JSONlite (⭐844) - A simple, self-contained, serverless, zero-configuration, json document store. (Bash)

Libraries

• aeson-qq (⭐80) - JSON quasiquoter for Haskell.

• json2react (⭐167) - Use JSON to create React Stateless Components.

Online tools

• JSON.fr - Fully client-side validator and formatter.

Transformations

• normalizr (⭐21k) - Normalizes nested JSON according to a schema. (Javascript)

Jan 27, 2017

JSON Schema Resources

• 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.

Dec 21, 2016

Command-line tools

• gron (⭐13k) - Convert a JSON file into discrete assignments that are greppable.

Libraries

• circe (⭐2.5k) - Yet another JSON library for Scala.

Dec 09, 2016

Libraries

• JSON-Fortran (⭐318) - A Fortran library for writing, reading, and manipulating JSON files and data structures.

Dec 08, 2016

Online tools

• json2yaml - Convert JSON to YAML online.

JSON Schema Tools

• js-schema (⭐386) - 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.

Nov 26, 2016

Online tools

• JSON Formatter and Validator - Formatter to help with debugging.

Oct 12, 2016

Online tools

• JSONPlaceholder - Fake Online REST API for Testing and Prototyping.

Sep 21, 2016

Databases

• RethinkDB - An open-source distributed document database with a pleasant and powerful query language.

Queries

• json-rel (⭐16) - Transparent references in JSON.

JSON Schema Resources

• Understanding JSON Schema - A website aiming to provide more accessible documentation for JSON schema.

Jul 22, 2016

Queries

• JSONSelect (⭐1.6k) - CSS-like selectors. (Javascript)

JSON Schema Tools

• Orderly JSON (⭐222) - A textual format for describing JSON compiled into JSONSchema.

Jul 10, 2016

Transformations

• json-transforms (⭐137) - A recursive, pattern-matching, approach to transforming JSON structures.

May 09, 2016

Databases

• MongoDB - an open-source document database, and the leading NoSQL database.

Format Extensions

• JSON Resume - The open source initiative to create standard for resumes.

Libraries

• JSON::Tiny (⭐11) - Perl module for encoding and decoding JSON in a minimalistic way.

• MultiJSON (⭐746) - A generic swappable back-end for JSON handling.

Transformations

• JsonMapper (⭐1.5k) - Map nested structures onto PHP classes (PHP)

Apr 08, 2016

Format Extensions

• JSON Web Tokens - A compact URL-safe means of representing claims to be transferred between two parties.

Apr 06, 2016

JSON Schema Frontend components

• AlpacaJS - Generates JSON Schema driven forms on top of Bootstrap, jQuery Mobile, jQuery UI and HTML (jQuery)

Feb 19, 2016

Libraries

• JSON-java (⭐4.5k) - A reference implementation.

JSON Schema Frontend components

• angular-schema-form (⭐2.5k) - Generate forms. (AngularJS)

Feb 16, 2016

Libraries

• PL/JSON (⭐440) - A generic JSON object written in PL/SQL.

Jan 20, 2016

Databases

• Kinto (⭐4.3k) - A lightweight JSON storage service with synchronisation and sharing abilities.

Format Extensions

• /contribute.json - Making open source contribution information easier to access, across projects.

Tutorials

• What is JSON and how to use it - Video tutorial for beginners.

Nov 14, 2015

Command-line tools

• json - A "json" command for massaging JSON on your Unix command line.

Datasets

• Heartstone JSON - Up to date Hearthstone card data.

Frontend components

• jsTree - jquery plugin, that provides interactive trees. (jQuery)

Libraries

• Gson (⭐23k) - A Java library to convert JSON to Java objects and vice-versa.

JSON Schema Tools

• JSON Schema + Faker (⭐3.2k) - Fake your schemas.

May 07, 2015

Databases

• JSON Server (⭐71k) - Get a full fake REST API with zero coding in less than 30 seconds.

May 01, 2015

Applications

• JSONExport (⭐4.8k) - convert a object to a class of one of the currently supported languages.

Supersets

• HanSON (⭐153) - JSON for Humans - with unquoted identifiers, multi-line strings and comments.

Related formats

• CSON (⭐1.3k) - CoffeeScript-Object-Notation. JSON for CoffeeScript objects.

• MSON (⭐895) - Markdown syntax compatible with describing JSON and JSON Schema.

• ArchieML - Structured text format optimized for human writability.

Apr 21, 2015

Command-line tools

• jsawk (⭐1.4k) - Like awk, but for JSON.

JSON Schema Tools

• DLL.js (⭐67) - Gets you a JSON Schema from PostgreSQL or SQLite3.

Apr 15, 2015

Frontend components

• JSON Formatter (⭐369) - Angular directive for collapsible JSON in HTML. (AngularJS)

JSON Schema Frontend components

• JSON Editor (⭐5.8k) - JSON Schema Based Editor. (jQuery)

• JSON Schema View (⭐49) - An AngularJS directive for rendering JSON Schema in HTML (AngularJS)

• Angular JSON Schema Form (⭐30) - Angular directive for making forms out of JSON Schema. (AngularJS)

Apr 11, 2015

Binary Serialization

• PSON (⭐459) - Protocol JSON, super efficient binary serialization format.

Apr 10, 2015

Data generation

• dyson (⭐835) - Server for dynamic, fake JSON. (node.js)

Libraries

• moshi (⭐9.5k) - A modern JSON library for Android and Java.

Online tools

• JSON Selector Generator - A simple GUI for generating the selectors to access.

Services

• jsonpad - a simple JSON storage platform.

Transformations

• jsontl (⭐7) - allow transformation using a JSON-based transformation language. (node.js)

Apr 08, 2015

Data generation

• jsonymize (⭐17) - Reads data from standard input, anonymizes, then writes to standard output.

Apr 07, 2015

Transformations

• Pinch (⭐27) - String.replace for JavaScript objects. (Javascript)

JSON Schema Tools

• Docson (⭐491) - Documentation for your types.

Apr 06, 2015

Command-line tools

• jarg - Shorthand JSON and form encoding syntax in the shell.

Supersets

• μson (⭐69) (uson) - a shorthand for JSON.

Apr 05, 2015

Transformations

• fanci (⭐30) - Extract, rename and transform JSON based on a template. (node.js)

Mar 30, 2015

Databases

• lowdb (⭐21k) - Flat file database built on lodash API. (Javascript)

• JSON ODM (⭐101) - Object document mapper for JavaScript to use on the server or in the browser. (Javascript)

Mar 29, 2015

Differencing

• dffptch (⭐170) - A micro library for diffing and patching using a compact diff format. (Javascript)

• jsondiffpatch (⭐4.7k) - Diff & patch for JavaScript objects. (Javascript)

Editors

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

Format Extensions

• JSON-stat (⭐22) - Simple lightweight format for data dissemination.

Libraries

• JSONKit (⭐6.2k) - Objective-C library.

Linters

• JSON Lint (⭐1.3k) - PHP linter. (PHP)

Online tools

• Collapsible JSON Formatter - Formatter and Colorer of Raw Code.

Text Editor Plugins

• JSON Reformat (⭐172) - Reformat tool.

Transformations

• json2json (⭐190) - Transform (reformat) structures from one to another. (Javascript)

Queries

• searchjs (⭐309) - A library for filtering based on a json SQL-like language.

JSON Schema Tools

• prmd (⭐2.1k) - Tools and doc generation for HTTP APIs.

• jsonschema2pojo (⭐6.1k) - Generates Java types and annotates those types for data-binding with Jackson 1.x or 2.x, Gson, etc.

• Matic (⭐176) - Build tool for generating HTML documentation.

Mar 28, 2015

Browser Extensions

• JSONView (github (⭐1.5k)) - View JSON documents in the browser.

Datasets

• countries (⭐5.9k) - World countries.

Differencing

• JSON-Patch (⭐1.7k) - Lean and mean Javascript implementation of the JSON-Patch standard (RFC 6902). (Javascript)

• jiff (⭐614) - JSON Patch and diff based on rfc6902. (Javascript)

• json-patch-php (⭐111) - implementation of JSON-patch (IETF RFC 6902) (PHP)

Format Extensions

• JsonML - A compact format for transporting XML-based markup as JSON which allows it to be losslessly converted back to its original form.

• Collection+JSON - A read/write hypermedia-type designed to support management and querying of simple collections.

Frontend components

• JSON editor jQuery plugin (⭐560) - component for you web apps/pages. (jQuery)

• jqTree - Widget for displaying a tree structure in html. (jQuery)

Libraries

• ArduinoJson (⭐6.6k) - An efficient library for embedded systems.

• JSON++ (⭐41) - A self contained Flex/Bison parser for C++11.

• json11 (⭐2.5k) - A tiny library for C++11.

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

• Fast JSON Processor (⭐26k)

• JSON-js (⭐8.7k) - JSON in JavaScript.

• Webmozart JSON (⭐357) - A robust decoder/encoder with support for schema validation.

• simplejson (⭐1.6k) - A simple, fast, extensible encoder/decoder

• jsonpickle - Library for serializing any arbitrary object graph.

• oj (⭐3.1k) - A fast JSON parser and Object marshaller as a Ruby gem.

• jsonfx (⭐380) - serialization framework for .NET.

• spray-json (⭐970) - A lightweight, clean and simple implementation in Scala.

• SwiftyJSON (⭐22k) - The better way to deal with data in Swift.

Linters

• jsonlint (⭐1.9k) - Parser and validator with a CLI. (Javascript)

Online tools

• JSON Utils - Site for generating C#, VB.Net, and Javascript classes from JSON.

• jq play - A playground for jq.

Tutorials

• Introducing JSON

Templates

• rabl (⭐3.7k) - 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 (⭐963) - Write JSON unit tests in less code. Great for testing REST interfaces. (Java)

• JsonUnit (⭐854) - A library that simplifies JSON comparison in unit tests. It's strongly inspired by XmlUnit.

Text Editor Plugins

• vim-json (⭐1.2k) - A better JSON for Vim: distinct highlighting of keywords vs values, JSON-specific (non-JS) warnings, quote concealing. Pathogen-friendly.

Transformations

• trans (⭐178) - The ultimate object transformer. (Javascript)

• osmtogeojson (⭐669) - Converts OSM data to GeoJSON. (Javascript)

• JSONC (⭐646) - JSON compressor and decompressor. (Javascript)

• 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 (⭐42) - OS X utility that converts a JSON object to a Foundation object that can be used in Cocoa/Cocoa Touch development. (Swift)

Queries

• JSON Mask (⭐862) - Tiny language and engine for selecting specific parts of a JS object, hiding the rest. (Javascript)

JSON Schema Tools

• generate-schema (⭐1k) - Effortlessly convert your JSON Object to JSON Schema, Mongoose Schema, or a Generic template for quick documentation / upstart.

JSON Schema Validators

• json-schema-benchmark (⭐384) - Performance benchmark for Node.js validators.

• is-my-json-valid (⭐957) - A validator that uses code generation to be extremely fast.

• jsen (⭐156) - A validator built for speed.

• themis (⭐60) - A blazing fast validator.

• jsck (⭐159) - JSON Schema Compiled checK.

• z-schema (⭐338) - validator written in JavaScript for NodeJS and Browsers.

• jjv (⭐196) - Javascript Library for Schema Validation.

• request-validator (⭐0) - Flexible request validator middleware for express and connect.

• tv4 (⭐1.2k) - Tiny Validator.

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