Paste a JSON example and get a JSON Schema (draft-07) describing its shape. Handy for validation, documentation and API contracts.
How to Use
- Paste a valid JSON example into the box.
- Press Generate schema.
- Review the JSON Schema (draft-07) in the output box.
- Press Copy to use it in your validator or docs.
Key Features
- Draft-07 output — widely supported JSON Schema version.
- Nested structures — objects and arrays are inferred recursively.
- Integer detection — whole numbers become integer, decimals become number.
- Clear errors — invalid JSON gets a readable error message.
- 100% private — runs entirely in your browser; nothing is sent or stored.
FAQs
What is JSON Schema?
A standard for describing the shape of JSON data — which fields exist, their types and constraints — so data can be validated automatically.
Does it detect required fields?
This generator describes types and structure. Mark fields as required manually in the schema if your use case needs it.
Can it handle large JSON?
Yes, within reason. Very large documents may take a moment, but typical API examples generate instantly.
What if my JSON is invalid?
The tool shows the parse error so you can fix the JSON — try our JSON Formatter to tidy it first.
Is my data sent anywhere?
No. Everything runs entirely in your browser and never transmits or saves your entries.
Related Tools
Try these related tools: JSON Formatter, JSON to YAML Converter and JSON Diff Checker.