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JSON to JSON Schema

Generate a draft-07 JSON Schema from a JSON sample. Infers types, properties, required fields, and string formats.

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Your files are processed locally in your browser and never uploaded to a server.

How it works

  1. 1Paste your JSON sample
  2. 2Toggle required fields and string format detection
  3. 3The tool walks the value and emits a draft-07 schema
  4. 4Download the schema or feed it into any validator

FAQ

What dialect of JSON Schema is produced?

Draft-07. The output sets $schema to http://json-schema.org/draft-07/schema# and works with any draft-07 validator (e.g. ajv).

How are mixed-type arrays handled?

If every item in an array has the same shape, the schema uses that shape as items. If items differ, the schema uses oneOf to enumerate the observed shapes.

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