Why this tool exists
Work with the structure, not the noise.
A sample can reveal a useful first draft of a schema, including object properties, required keys, array items and primitive types. Generated schemas are starting points rather than contracts: one example cannot reveal every optional field, permitted range or business rule.
Generate Draft 2020-12 schema syntax
Infer nested objects, arrays and primitive types
Detect common string formats such as date-time and email
Keep the schema editable for application-specific rules
How to use it
From payload to useful result.
Use a representative sample
Include meaningful nested values and multiple array items when possible.
Generate the draft
The tool infers observed types and marks observed object properties as required.
Add business constraints
Review optionality, enums, ranges, patterns and additionalProperties before production use.
Common questions
Before you use the output.
Can one example define a complete schema?
No. A sample only proves what was observed. It cannot reliably infer optional fields or every allowed value.
Which draft is generated?
The output declares JSON Schema Draft 2020-12.