What is JSON Schema used for?

JSON Schema is a standard for describing the structure of JSON data. It is used for API documentation, request and response validation, code generation, and form building.

Which JSON Schema draft does JSONBlitz generate?

Draft-07, which has the widest tool support — compatible with AJV, jsonschema (Python), and most API documentation tools including Swagger and OpenAPI.

Can I use the schema with OpenAPI or Swagger?

Yes. JSON Schema draft-07 is directly compatible with OpenAPI 3.0 schema objects. Copy the generated schema into your OpenAPI spec components/schemas section.

Does it detect formats like email and date?

Yes. Common string patterns are detected automatically: email addresses get format "email", ISO date strings get format "date", and datetime strings get format "date-time".

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JSON to JSON Schema Generator — Draft-07, Free and Private

Paste any JSON below and JSONBlitz generates a complete JSON Schema (Draft-07) instantly. Types are inferred automatically — strings, integers, numbers, booleans, arrays, and nested objects. Common formats are detected: email addresses, ISO dates, date-time strings, and URIs. The schema includes a required array for all non-null fields.

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Also try: JSON to TypeScript · JSON to Zod Schema · Fix Invalid JSON

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JSONBlitz is a free, 100% private, client-side JSON formatter, validator, and repair tool. Paste messy JSON, console logs, API responses, or stack traces — JSONBlitz finds the JSON, fixes it automatically, and gives you clean output plus TypeScript interfaces, Zod schemas, and Python TypedDict code. Nothing ever leaves your browser.

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Paste any broken JSON into JSONBlitz. Common errors like trailing commas, single quotes instead of double quotes, unquoted keys, and JavaScript comments are all fixed automatically in one click. The status bar shows exactly what was repaired.

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Trailing commas in JSON objects and arrays are one of the most common errors when copying JSON from JavaScript code. JSONBlitz removes trailing commas automatically and shows you what changed in the Before/After tab.

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Paste any JSON and click the TS+Zod tab to instantly generate recursive TypeScript interfaces, Zod validation schemas, and Python TypedDict classes. No signup required. Works completely offline.

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Frequently Asked Questions

What is JSON Schema used for?: JSON Schema is a standard for describing the structure of JSON data. It is used for API documentation, request and response validation, code generation, and form building.
Which JSON Schema draft does JSONBlitz generate?: Draft-07, which has the widest tool support — compatible with AJV, jsonschema (Python), and most API documentation tools including Swagger and OpenAPI.
Can I use the schema with OpenAPI or Swagger?: Yes. JSON Schema draft-07 is directly compatible with OpenAPI 3.0 schema objects. Copy the generated schema into your OpenAPI spec components/schemas section.
Does it detect formats like email and date?: Yes. Common string patterns are detected automatically: email addresses get format "email", ISO date strings get format "date", and datetime strings get format "date-time".