How to use JSON to JSON Schema
JSON Schema can document and validate data independently of a particular programming language. This generator emits Draft 2020-12 structure, required properties and array item schemas from the example you provide.
Every observed object property is marked required and additional properties are disabled in the generated starting point. Review those choices against the actual producer before publishing the schema as a contract.
A reliable workflow
- Paste a representative JSON document
- Generate the Draft 2020-12 schema
- Review required fields, additionalProperties and anyOf branches before validation use
Worked example
Infer a schema from the included order and line-item sample
{"orderId":"A-104","total":49.9,"paid":false,"items":[{"sku":"P1","qty":2}]}The result declares Draft 2020-12, describes the nested item array and marks every observed property as required. Review that strictness before treating the sample as a contract
When this tool helps
- Start documentation for an internal API
- Create validation fixtures for an integration
- Describe configuration files shared across languages
Accuracy and safety notes
- Formats, descriptions, numeric limits and string patterns require domain knowledge and are not inferred
- Mixed arrays generate anyOf item alternatives that may need simplification
Frequently asked questions
Does XXF upload or store my data?+
No. The conversion runs locally in your browser. Your input is not sent to XXF, stored on a server or used for training.
Which JSON Schema version is generated?+
The output declares JSON Schema Draft 2020-12 and can be extended with formats, ranges and descriptions.