Developer
JSON Schema Generator
Generate a starter JSON Schema from pasted JSON data in your browser.
Generated schemas are starter drafts. Review formats, enums, ranges, nullable values, and application rules before using them in production.
How to use JSON Schema Generator
Best for
- Creating a first-pass schema from example JSON payloads.
- Documenting object properties, array items, and required fields.
- Starting a validation schema before editing business rules by hand.
Steps
- Paste a representative JSON object or array into the input box.
- Choose whether object fields should be marked required.
- Generate the schema, review inferred types, and copy the output.
Notes
- Generated schemas are drafts based on examples, not a complete contract.
- Review nullable fields, enums, formats, minimums, maximums, and application-specific rules manually.
FAQ
Does JSON Schema Generator upload my JSON?
No. The schema is inferred locally in your browser from the JSON you paste.
Can this infer every validation rule?
No. It can infer structure and basic types from examples, but it cannot know domain-specific rules such as allowed values or numeric ranges.