JSON Sample Data Generator
Generate sample JSON documents from a JSON Schema. Paste a schema on the left and click Generate.
Generate sample JSON documents from a JSON Schema. Paste a schema on the left and click Generate.
The JSON Sample Generator creates realistic mock data from JSON Schema definitions, enabling developers to quickly generate test datasets, API response examples, or placeholder content for development and testing. Essential for teams building APIs, frontend applications, or data pipelines, it interprets schema constraints, data types, and validation rules to produce valid sample JSON that matches your specifications. Whether you're prototyping interfaces, creating documentation examples, or testing edge cases, the generator handles complex nested schemas with ease.
You can paste schema definitions directly, upload schema files, or work with various JSON Schema draft versions to generate compliant data. Because generation runs client-side, your schemas stay private and samples appear instantly without server dependencies. The tool integrates well with the validator — generate samples first, then validate against your schema to verify compliance. Perfect for creating test fixtures, populating development databases, or generating example payloads for API documentation. Try different schema patterns to see how it handles arrays, objects, constraints, and custom formats.
All generation happens in your browser. No schemas or data are sent to our servers, ensuring complete privacy.
Instant sample generation with realistic data that matches your schema constraints.
Generates data that strictly follows your JSON Schema definitions and validation rules.
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.