System.Text.Json-based support for all of your JSON needs.

Greg Dennis

JsonSchema.Net

Json.NET Schema is a powerful, complete and easy to use JSON Schema framework for .NET

James Newton-King

Json.NET Schema

Support for Json Schema validation and entity generation

Matthew Adams

Corvus.JsonSchema

Simple and high performance json schema implementation for .Net and related json validation in .Net

LateApexEarlySpeed

LateApexEarlySpeed.Json.Schema

Kirit Sælensminde

f5-json-schema

JSON schema validator for JSON for Modern C++

Patrick Boettcher

JSON schema validation for JSON for Modern C++

Header-only C++ library for JSON Schema validation, with support for many popular parsers

Tristan Penman

Valijson

A C++, header-only library for constructing JSON and JSON-like data formats, with JSON Pointer, JSON Patch, JSON Schema, JSONPath, JMESPath, CSV, MessagePack, CBOR, BSON, UBJSON

Daniel Parker

jsoncons

Julian Gosnell

Passes every test in the official JSON Schema Test Suite across all drafts from draft-03 through draft-next — 9,622 assertions with zero failures. Usable from Clojure, Java, Kotlin, Scala, JavaScript, and Node.js.

draft-next

jinx is not xml-schema (it's json-schema!)

Malcolm Sparks

jinx

Clojure library JSON Schema validation and generation - Draft-07 compatible

Henrik Mohr

luposlip/json-schema

JSON Essentials™ for COM/ActiveX is a language independent JSON toolkit for rapid implementation of the most common JSON use cases on the Windows platform

Alexander Stoyan

JSON Essentials for COM/ActiveX

Matt Novenstern

json-schema (fisxoj)

An opinionated JSONSchema compiler for elixir.

Isaac Yonemoto

Exonerate

Marcus Kruse

JsonXema

jesse (JSon Schema Erlang) is an implementation of a JSON Schema validator for Erlang.

Sergey Prokhorov

JeSSE

JSONSchema (draft 2020-12, draft 2019-09, draft-7, draft-6, draft-4) Validation using Go

Santhosh Kumar Tekuri

santhosh-tekuri/jsonschema

A powerful Go JSON Schema validator library aligned with the JSON Schema Draft 2020-12.

kaptinlin

jsonschema

Golang implementation of https://json-schema.org drafts 7 & 2019-09

Brendan O'Brien

qri-io/jsonschema

An implementation of JSON Schema, draft v4 v6 & v7 - Go language

xeipuuv

gojsonschema

Julien Viet

Vert.x Json Schema

A JSON Schema loader and validator, delivered as a Java library.

Andy Coates

jsonschemafriend

A fast Java JSON schema validator that supports draft V4, V6, V7, V2019-09 and V2020-12

Justin Tay

networknet/json-schema-validator

JSON Schema Validator for the JVM, implements draft 2020-12

Bence Eros

erosb/json-sKema

Snow, a full-featured JSON Schema validator

Shawn Silverman

Snow

JSON Schema validator for java, based on the org.json API

everit-org/json-schema

Justify is a JSON validator based on JSON Schema Specification and Jakarta JSON Processing API (JSON-P).

leadpony

Justify

JSON schema validation library written in Java. It can be used with all major JSON libraries (Jackson, GSON, JSON.org and more) and is open for customizations.

harrel56

json-schema (dev.harrel)

Immutable JSON structure to enable Java applications to utilize JSON Schemas INSIDE Java applications - avoiding extra serialization and deserialization.

Niklas Eldberger

Zuunr JSON

OpenAPI JSON Schema Generator allows auto-generation of API client libraries with a focus on JSON schema given an OpenAPI document

Justin Black

OpenAPI JSON Schema Generator

JSON Schema Validation, Annotation, and Bundling. Supports Draft 04, 06, 07, 2019-09, 2020-12, OpenAPI 3.0, and OpenAPI 3.1

Jason Desrosiers

@hyperjump/json-schema

Validate JSON Schema documents online using @hyperjump/json-schema

json-schema.hyperjump.io

Generate test coverage reports for the JSON Schemas in your codebase. Supports JSON and YAML. Integrates with Vitest.


@hyperjump/json-schema-coverage

A reasonably safe JSON Schema validator with draft-04/06/07/2019-09/2020-12 support.

Nikita Skovoroda

@exodus/schemasafe

Evgeny Poberezkin

A JSON schema validator that will run on Cloudflare workers. Supports drafts 4, 7, 2019-09, and 2020-12.

Jeremy Danyow

@cfworker/json-schema

Customizable and hackable json-validator and json-schema utilities for traversal, data generation and validation

Sascha Goldhofer

json-schema-library

Dynamic JSON Schema Validator - Supports draft-04/06

Alex Korzhikov

Create vuelidate validation rules based on json schema

Martin Hansen

vue-vuelidate-jsonschema

Tobias Buschor

jema.js

Erwin Bolwidt

Medeia-validator

Kotlin implementation of JSON Schema (Draft 07)

Peter Wall

json-kotlin-schema

The JSON schema validation library that works with

Oleg Smirnov

json-schema-validator

Validate data against a schema using a JSON Schema

Karen Etheridge

JSON::Schema::Modern

Validate data against a schema, minimally

JSON::Schema::Tiny

Jan Henning Thorsen

JSON::Validator

JSON Schema and OpenAPI data validator for Perl

Alexey Stavrov

JSONSchema::Validator

Sorin Sarca

Opis Json Schema

High definition PHP structures with JSON-schema based validation

Viacheslav Poturaev

Swaggest Json Schema

An object-oriented JSON Schema implementation for Python.

Mark Joseph

jschon

An implementation of the JSON Schema specification for Python

Julian Berman

Michal Hořejšek

fastjsonschema

Dmitry Dygalo

jsonschema-rs (Python)

jsonschema-rs

JSON Schema validator. Supports drafts 4, 6, 7, 2019-09, 2020-12, OpenAPI 3.0, and OpenAPI 3.1.

David Harsha

JSONSchemer

Ethan

JSONSchema (draft 2020-12, draft 2019-09, draft-7, draft-6, draft-4) Validation in Rust

Santhosh Tekuri

boon

This is a Scala implementation of a JSON Schema validator based upon the great io.circe Library.

Norbert Schultz

Reactive Core Circe JSON Validator

JSON Schema draft 4, 6 and 7 parsing and validation library written in Objective-C.

Andrei Podkovyrin

DSJSONSchemaValidation

Pure Lua JSON schema validator for Lua/LuaJIT

YuanSheng Wang

lua-resty-jsonschema

lua-schema is a JSON Schema (classical & modern) data validator for Lua. It validates data from a JSON instance or from any equivalent data model, for example CBOR, Message Pack, UBJSON or just plain Lua.

François Perrad

lua-schema

json-everything

JSON Schema web validator built on jschon.

jschon.dev

An online, interactive JSON Schema validator. Supports JSON Schema Draft 3, Draft 4, Draft 6, Draft 7, Draft 2019-09 and Draft 2020-12.

JSON Schema Validator

Ben Hutton

jsonschema.dev

Nick Maynard

JSON Schema Lint

Cyril

ExtendsClass's JSON Schema Validator

Clemens Uhlenhut

valbuddy

Command-line interface for Ajv JSON Validator

ajv-cli

Neil Pankey

yajsv

A command line JSON Schema validator that supports many file formats. Fork of jessedc/ajv-cli.

Adam Voss

Polyglottal JSON Schema Validator

The CLI for working with JSON Schema. Covers formatting, linting, testing, bundling, and more for both local development and CI/CD pipelines

Juan Cruz Viotti

Sourcemeta JSON Schema CLI

Or Rosenblatt

Validate JSON Action

An independent benchmark for Node.js JSON-schema validators based on JSON-Schema Test Suite.

Allan Ebdrup

json-schema-benchmark

Comparative benchmark for JSON-schema PHP validators using JSON-Schema Test Suite and z-schema/JSCK.

php-json-schema-bench

An independent functional and performance comparison of JVM-based validator implementations using JSON-Schema Test Suite and more.

json-schema-validation-comparison

@cloudflare/doca, part of JSON Schema Tools, provides a set of tools to generate documentation from JSON Schemas, supporting draft-04, -06, -07, and Doca extensions (UI forthcoming).

Henry Andrews

@cloudflare/doca

@adobe/jsonschema2md provides scripts to turn JSON Schema files into readable Markdown documentation, ready for consumption on GitHub or processed using Jekyll or other static site generators. Supports JSON Schema 2019-09 (partial).

Tobias Bocanegra

@adobe/jsonschema2md

FastAPI is an API framework based on Python 3.6+ types that generates OpenAPI 3 schemas, including JSON Schemas for all the models declared.