Draft-07 JSON Schema generated from sample data
JSON Input
JSON Schema (Draft-07)
Generate JSON Schema from a JSON sample
Paste any JSON document and get a Draft-07 JSON Schema inferred from it instantly — types, required properties, and nested structures included. Free, browser-based, and no data leaves your machine.
Frequently Asked Questions
- What is JSON Schema used for?
- JSON Schema formally describes the shape of JSON data. APIs use it to validate requests, editors use it for autocomplete, and OpenAPI builds on it for API contracts.
- What does Draft-07 mean?
- JSON Schema has evolved through drafts. Draft-07 is the most widely supported version across validators (Ajv, everit, etc.) and remains the safest default for interoperability.
- Can a schema be inferred perfectly from one sample?
- Inference captures the structure and types of the sample you provide, but one sample cannot reveal optional fields or alternative types. Review the output and relax constraints where needed.
- How do I validate JSON against the generated schema?
- Use a validator library — Ajv for JavaScript, jsonschema for Python — or an online validator. The generated schema works with any Draft-07 compliant tool.