JSON Schema generator
Infer a draft-07 schema from an example JSON document.
Bookmark this page
Keep this page handy for next time.
- On a computer
- Press Ctrl + D, or Command + D on a Mac.
- On a phone or tablet
- Open your browser's menu or Share menu and look for Add Bookmark, Bookmark or Add to favourites.
A bookmark saves the page link. Save any tool results separately.
Processed on your device
How to use this tool
- Provide a representative JSON sample.
- Choose whether observed properties should be required.
- Review the generated schema and add domain-specific bounds or patterns yourself.
Things to know
- An example cannot establish every valid input. Empty arrays produce an unrestricted item schema.
- Each text input accepts up to 5 MiB. Output is limited to 25 MiB and combined text settings to 1 MiB.
- Structured documents accept up to 128 nesting levels and 250,000 values; query and schema modes have additional limits.
- Generated schemas accept 250,000 values and 128 nesting levels. Use a representative sample when inference exceeds those limits.
You might also need
More in data & csvJSON Schema validator
Check JSON data against a local draft-07 JSON Schema.
JSON to TypeScript types
Infer TypeScript types from a JSON example, including nested arrays and objects.
YAML formatter and validator
Parse and reformat a YAML document with safe alias limits.
JSON formatter and validator
Validate and format JSON without rounding large integers.
CSV and JSON converter
Convert CSV records to JSON and JSON records to quoted CSV.
JSON and JSON Lines converter
Convert a JSON array to JSONL or combine JSON Lines into an array.
JSON and YAML converter
Convert between JSON and YAML while retaining large integer values.
JSON flatten and unflatten
Flatten JSON to JSON Pointer values and rebuild it without losing array types.
JSON Patch generator and applier
Generate RFC 6902 patches or safely apply a local patch to JSON.