JSON Schema Validator Online
Validate your JSON document against a JSON schema to ensure it conforms to the expected structure and format.
Validate your JSON document against a JSON schema to ensure it conforms to the expected structure and format.
The JSON Schema Validator verifies that JSON data conforms to a specified schema, ensuring data integrity, structure compliance, and type safety across applications and APIs. Essential for developers implementing data validation, API contract testing, or configuration verification, it supports multiple JSON Schema draft versions and provides detailed error reporting when validation fails. Whether you're enforcing API specifications, validating user input, or ensuring data consistency across services, the validator handles complex schemas with nested objects, arrays, and custom validation rules.
You can paste schemas and data directly, upload files, or work with schema libraries to validate your JSON against predefined structures. Because validation runs client-side, your data stays private and results appear instantly without server dependencies. The tool pairs naturally with the sample generator — create schemas, generate sample data, then validate it. Perfect for API testing, data pipeline validation, or ensuring configuration files meet specifications. Try validating data against different schema versions to see how constraint violations are reported.
All validation happens in your browser. No schemas or data are sent to our servers, ensuring complete privacy.
Instant validation with detailed error reporting and precise constraint checking.
Supports all JSON Schema features including complex validations, custom formats, and references.
Responsive design works perfectly on desktop, tablet, and mobile devices. No installation required.
No — processing is performed client-side in the browser. We don't persist your data.
Depends on device memory; for large files consider chunking or a server-based workflow.
Yes — the core tools are free to use with no signup required.
JSON Toolset stands out with its comprehensive suite of client-side tools, ensuring your data privacy and lightning-fast processing. No sign-ups, no server-side data storage – just efficient, secure JSON handling right in your browser.