JSON Schema Generator
Paste representative JSON to create a draft schema that describes its observed objects, arrays, strings, numbers, booleans, and nulls.
How to Use JSON Schema Generator
- Paste a valid and representative JSON document.
- Generate the schema and inspect inferred property and item types.
- Add business rules such as required fields, formats, ranges, enums, and reusable definitions before using it for validation.
From Sample JSON to Validation Rules
A generator can infer structural types from the values it sees, but a single sample cannot reveal every valid variant or business constraint. Optional fields may look required, and an empty array provides no evidence about its intended item type.
Review unions, nullability, integer versus number choices, nested objects, and array items. Choose the JSON Schema draft supported by your validator before relying on draft-specific keywords.
JSON Schema Generator Example
From `{"name":"Ada","active":true,"score":42}`, a starting schema can infer string, boolean, and integer properties. You still decide which properties are required and whether score has a valid range.
Frequently Asked Questions About JSON Schema Generator
Can one JSON sample produce a complete schema?
No. It can provide a structural starting point, but only domain requirements define optional fields, allowed values, formats, and edge cases.
What happens when an array is empty?
The sample contains no item value to infer, so the intended item schema must be supplied manually.
Is JSON Schema the same as Schema.org structured data?
No. JSON Schema validates JSON instance structure. Schema.org describes entities and relationships for shared semantic meaning.