AI JSON Schema Generator
Paste a sample JSON object on the left and click Generate JSON Schema. The schema is inferred in your browser and can be used as a starting point for validation or API contracts.
Generated JSON Schema
Why generate JSON Schema from example JSON?
Writing JSON Schema by hand can be tedious, especially for large or nested objects. By pasting a realistic example payload, you can:
- Quickly bootstrap validation rules for APIs and microservices.
- Document expected fields and types for frontend and backend teams.
- Generate starter schemas to use with validators like AJV or OpenAPI tools.
This tool infers basic types, object properties, required fields, and array item types based on your sample JSON.
FAQ: JSON Schema Generator
Is this JSON Schema generator free?
Yes — the JSON Schema generator on Dev Brains AI is free to use in your browser.
Do you send my JSON to a server?
No. Your JSON is parsed locally in the browser and the schema is generated on the client side.
Which draft of JSON Schema does this follow?
The generated schema roughly follows JSON Schema draft-style syntax with type, properties, items, and required fields. For advanced use, you may need to refine it manually.
Can I use this schema in production?
Yes, but always review and adapt it to match your exact validation rules, edge cases, and API contracts before using it in production.
More JSON tools from Dev Brains AI
Combine this generator with the JSON Formatter & Validator to clean and validate payloads before defining schemas, use the AI Error Message Explainer to understand validation errors and runtime issues more easily, or convert the same example JSON into TypeScript interfaces with the JSON to TypeScript Converter.