100% OpenAI Strict Mode Compatible
JSON to OpenAI Schema Converter(Strict Mode Ready)
Stop writing verbose JSON Schemas by hand. Paste your JSON sample, get a production-ready schema with additionalProperties: false and complete required arrays.
Options:
ValidWhy Use This Tool?
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Strict Mode Ready
Automatically adds additionalProperties: false to every nested object.
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Auto Required Fields
Automatically syncs property keys to the required array.
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Multi-Language Export
Get Python SDK, cURL, Zod, and Pydantic models.
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Real-time Conversion
See your schema update instantly as you type.
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Validation Built-in
Validates your schema against strict mode requirements.
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100% Free & Private
Runs entirely in your browser. No data sent to any server.
Popular Templates
Start with a production-ready schema for common use cases.