JSON Schema Generator

Generate JSON Schema drafts from sample documents

Infer JSON Schema from sample JSON — draft-07 compatible output generated locally for APIs and validation.

Also known as: jsonschema generator · create json schema · sample to schema · openapi schema generator

100% In-Browser & Private — your data never leaves this device
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How to use the JSON Schema Generator

  1. Paste representative sample JSON (one or more examples).
  2. Choose draft version and options (required keys, array item typing).
  3. Review the inferred JSON Schema.
  4. Copy or download — refine types manually for production.

FAQ

Is the schema guaranteed for all future JSON?
No — inference is from samples you provide. Tighten types and required fields before production use.
Is my JSON uploaded?
No. Schema generation runs entirely in your browser.
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