JSON to JSON Schema
Generate a JSON Schema (draft 2020-12) from example JSON data.
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How to Generate JSON Schema
Paste representative JSON and convert it. The tool infers object properties, arrays, and primitive types from your sample, marking a field required only when every sampled record contains it.
Specification and Inference Limits
Output targets JSON Schema draft 2020-12 (https://json-schema.org/draft/2020-12/schema). The schema describes the sample you provided: it cannot prove future records conform, nested required lists reflect only the sampled records, and additionalProperties is set to false to surface unexpected keys early.
Frequently Asked Questions
Is this a validator?
No. It infers a JSON Schema from sample data. Use the JSON Validator for syntax checks.
How are arrays handled?
Item schemas are merged across every record in the sample array. A property is only marked required when it appears in all records, and mixed item types become a union of types.
Which JSON Schema draft is produced?
The output declares JSON Schema draft 2020-12 via the $schema keyword and uses only core type, properties, items, required, and additionalProperties keywords from that specification.
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