A JSON Schema is "just JSON", so treat the schema like JSON and do validation as you usually would.
You should download the meta-schema, although this can be updated without notice or versioning (unlikely, but possible).

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GitHub
github.com โ€บ networknt โ€บ json-schema-validator
GitHub - networknt/json-schema-validator: A fast Java JSON schema validator that supports draft V4, V6, V7, V2019-09 and V2020-12 ยท GitHub
A fast Java JSON schema validator that supports draft V4, V6, V7, V2019-09 and V2020-12 - networknt/json-schema-validator
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Languages ย  Java 98.6% | Python 1.4%
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Baeldung
baeldung.com โ€บ home โ€บ json โ€บ introduction to json schema in java
Introduction to JSON Schema in Java
November 27, 2024 - JSON Schema Validation: The JSON Schema Validation specification is the document that defines the valid ways to define validation constraints. This document also defines a set of keywords that can be used to specify validations for a JSON API.
Discussions

Is it possible to validate one JSON schema structure with another JSON schema with Java?
Is It possible to validate one JSON schema structure with another JSON schema ? I haven't found any Java SDK/library yet to validate one schema against another json schema. More on github.com
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How to validate JSON schema structure with another JSON schema with Java? - Stack Overflow
If your evaluator can accept a ... "https://json-schema.org/draft/2020-12/schema", and your schema as the input data. Evaluators should be able to accept URIs of "known" schemas, that have been preloaded ahead of time, and if your implementation supports this version of the specification, then it should know what to do with that URI. FWIW, your schema is valid. ... I need to do this validation through Java, And i haven't ... More on stackoverflow.com
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XML Schema Validation 1.1 in Java
There's such thing as a JSON Schema - being able to validate an XML against a grammar isn't an unique benefit of this file format from my understanding? More on reddit.com
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November 9, 2025
How to validate JSON schema in java? - Stack Overflow
I try to check user detail object with use JSON schema. But I don't know how to check JSON object in Java. My Schema: { "type" : "object", "properties" : { "first_name" : { ... More on stackoverflow.com
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JSON Schema
json-schema.org โ€บ tools
JSON Schema - Tools
Bowtie is a meta-validator for JSON Schema implementations and it provides compliance reports.
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Wikipedia
en.wikipedia.org โ€บ wiki โ€บ JSON
JSON - Wikipedia
March 6, 2005 - The official MIME type for JSON ... include text/json, text/x-json, and text/javascript. The standard filename extension is .json. JSON Schema specifies a JSON-based format to define the structure of JSON data for validation, documentation, and interaction contr...
Find elsewhere
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Reddit
reddit.com โ€บ r/java โ€บ xml schema validation 1.1 in java
r/java on Reddit: XML Schema Validation 1.1 in Java
November 9, 2025 - The whole SOAP, UDDI, and service ecosystem didnโ€™t gain traction. JSON is native to JavaScript and browsers. Strict validation was too bothersome except in niche cases. JSON schema was developed and exists, but Iโ€™ve never seen it used.
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Coderanch
coderanch.com โ€บ t โ€บ 631596 โ€บ java โ€บ Json-string-validation-json-schema
Json string validation against json schema in Java (Java in General forum at Coderanch)
A quick search for "validating json in java against schema" found http://stackoverflow.com/questions/14511468/java-android-validate-string-json-against-string-schema, which looks promising.
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Opcito Technologies
opcito.com โ€บ blogs โ€บ automating-api-reliability-json-schema-java
Automate API reliability with JSON schema in Java
October 9, 2025 - Schema validation is one of the simplest yet most powerful ways to ensure API reliability. It enforces a shared understanding between systems and catches structural issues long before they reach production. For QA engineers working with Java, integrating JSON Schema validation using libraries like networknt/json-schema-validator can bring consistency and confidence to automated testing pipelines.
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Google AI
ai.google.dev โ€บ gemini api โ€บ structured outputs
Structured outputs | Gemini API | Google AI for Developers
January 12, 2026 - To generate a JSON object, set the response_mime_type in the generation configuration to application/json and provide a response_json_schema. The schema must be a valid JSON Schema that describes the desired output format.
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Medium
medium.com โ€บ @AlexanderObregon โ€บ data-validation-for-api-requests-in-spring-boot-with-json-schema-c109acbd325c
Data Validation for API Requests in Spring Boot with JSON Schema
August 16, 2025 - If the syntax is correct but the ... filling gaps with nulls or defaults. Schema validation addresses that by catching structure issues before the mapping process runs....
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Eclipse Vert.x
vertx.io โ€บ docs โ€บ vertx-json-schema โ€บ java
JSON Schema | Eclipse Vert.x
Vert.x Json Schema provides an extendable and asynchronous implementation for Json Schema specification. You can use Json Schemas to validate every json structure.
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Medium
medium.com โ€บ @mohommad.belal โ€บ json-schema-validator-using-java-springboot-667ed42480d5
JSON Schema Validator using Java SpringBoot. | Medium
May 11, 2024 - Simple json can be validated when mapped to POJOs or models using some constraints on the attributes. But, sometimes the json is complex and not all fields can be validated using such constraints.
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JSON Schema Validator
jsonschemavalidator.net
JSON Schema Validator - Newtonsoft
public class JsonSchemaController : ControllerBase { [HttpPost] [Route("api/jsonschema/validate")] public ValidateResponse Validate(ValidateRequest request) { // Load schema JSchema schema = JSchema.Parse(request.Schema); JToken json = JToken.Parse(request.Json); // Validate json IList<ValidationError> errors; bool valid = json.IsValid(schema, out errors); // Return error messages and line info to the browser return new ValidateResponse { Valid = valid, Errors = errors }; } } public class ValidateRequest { public string Json { get; set; } public string Schema { get; set; } } public class ValidateResponse { public bool Valid { get; set; } public IList<ValidationError> Errors { get; set; } }
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DZone
dzone.com โ€บ software design and architecture โ€บ integration โ€บ how to perform json schema validation in api testing using rest-assured java
How To Perform JSON Schema Validation
July 8, 2024 - This article is a step-by-step tutorial to learn about JSON Schema validation in API Automation Testing using the Rest-Assured framework.
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GitHub
github.com โ€บ everit-org โ€บ json-schema
GitHub - everit-org/json-schema: JSON Schema validator for java, based on the org.json API
JSON Schema validator for java, based on the org.json API - everit-org/json-schema
Starred by 898 users
Forked by 280 users
Languages ย  Java 100.0% | Java 100.0%
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Swagger
swagger.io โ€บ specification
OpenAPI Specification - Version 3.1.0 | Swagger
The OpenAPI Specification defines a standard interface to RESTful APIs which allows both humans and computers to understand service capabilities without access to source code, documentation, or network traffic inspection.
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W3C
validator.w3.org
The W3C Markup Validation Service
W3C's easy-to-use markup validation service, based on SGML and XML parsers.