Json.NET Schema

Complete JSON Schema framework for .NET

Version 4.0.1

JSchema schema = JSchema.Parse(@"{
  'type': 'object',
  'properties': {
    'name': {'type':'string'},
    'roles': {'type': 'array'}
  }
}");

JObject user = JObject.Parse(@"{
  'name': 'Arnie Admin',
  'roles': ['Developer', 'Administrator']
}");

bool valid = user.IsValid(schema);
// true

Validate JSON

JSchemaGenerator generator = new JSchemaGenerator();
JSchema schema = generator.Generate(typeof(Account));
// {
//   "type": "object",
//   "properties": {
//     "email": { "type": "string", "format": "email" }
//   },
//   "required": [ "email" ]
// }

public class Account
{
    [EmailAddress]
    [JsonProperty("email", Required = Required.Always)]
    public string Email;
}

Generate Schemas

JSchema schema = JSchema.Parse(@"{
  'type': 'array',
  'item': {'type':'string'}
}");
JsonTextReader reader = new JsonTextReader(new StringReader(@"[
  'Developer',
  'Administrator'
]"));

JSchemaValidatingReader validatingReader = new JSchemaValidatingReader(reader);
validatingReader.Schema = schema;

JsonSerializer serializer = new JsonSerializer();
List<string> roles = serializer.Deserialize<List<string>>(validatingReader);

Validate Deserialization

Complete JSON Schema Support

Complete support for Draft 2019-09 of JSON Schema. Find out more at json-schema.org.

Validate Any JSON

Protect your applications from invalid JSON. Validate existing JSON, or validate it as you read and write it.

Generate JSON Schemas

Generate JSON Schemas automatically from your existing .NET types.

High Performance

Tuned for high-performance schema validation of JSON documents large and small.

Easy To Use

Easy to use and well-documented API.

Run Anywhere

Json.NET Schema supports Windows, MacOS, Linux, Mono, and Xamarin.

Complete JSON Schema Support

Json.NET Schema passes 100% of the official JSON Schema Test Suite and has backwards compatibility with older standards.

The online schema validator at jsonschemavalidator.net uses Json.NET Schema and has been tested with tens of thousands of user schemas.

High Performance

Designed with performance in mind, Json.NET Schema's unique streaming validation enables fast, efficient validation over any JSON.

Json.NET Schema is over twice as fast as the .NET Framework's XmlSchema when validating equivalent data.

Edition	Price
AGPL 3.0	Free with limitations (1000 validations per hour)
1 Developer Indie *	$129 USD
1 Developer Business	$199 USD
Site License	$1299 USD

Json.NET Schema

Complete JSON Schema Support

Validate Any JSON

Generate JSON Schemas

High Performance

Easy To Use

Run Anywhere

Used by hundreds of customers including these fine companies

Complete JSON Schema Support

High Performance

Help

Json.NET Schema Documentation

Stack Overflow

Licensing & Pricing