JSON Schema Validator
Validate JSON data against JSON Schema definitions. Get detailed error reports with paths. All processing done in your browser.
JSON data is valid against the provided schema!
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How to Use JSON Schema Validator
Enter Schema
Define your JSON Schema that describes the expected structure.
Enter Data
Paste the JSON data you want to validate against the schema.
Validate
Click Validate and review the results for any errors.
What is JSON Schema?
JSON Schema is a vocabulary that allows you to annotate and validate JSON documents. It provides a contract for what JSON data is required for a given application and how to interact with it. JSON Schema is used for validation, documentation, and generating mock data.
Key Features
Type Validation
Validate types: string, number, integer, boolean, array, object, null
Constraints
Min/max length, range, pattern, required fields, and more
Structure Definition
Define nested objects, arrays, and complex data structures
Frequently Asked Questions
This tool supports JSON Schema Draft-07, Draft 2019-09, and Draft 2020-12 through the Ajv library. Most common schema features are supported.
Yes! JSON Schema supports deeply nested objects and arrays. You can define properties and items at any level of nesting, with individual validation rules for each field.
The tool first validates that your schema itself is valid JSON Schema. If the schema has errors, those will be reported before attempting to validate the data.