Question 1

What does this JSON Schema generator do?

Accepted Answer

It infers a JSON Schema from a sample value. Objects get properties and required keys, arrays get items, and primitives get type. The result is a starting point, not a full specification of every constraint.

Question 2

Which draft does it target?

Accepted Answer

A draft-07-ish subset: $schema, type, properties, items, and required. It does not emit $ref, format, or every combinator. Integers are typed as integer when the sample is a whole number.

Question 3

How is required determined?

Accepted Answer

For a single object, every present key is required. For an array of objects, required is the intersection — keys that appear on every item. Missing keys in some items become optional properties.

Question 4

Is my JSON uploaded?

Accepted Answer

No. Inference runs in the browser. Copy the schema or paste it into the JSON Schema validator on this site. Nothing is sent to ToolPetal.

JSON Schema Generator