JSON ToolsFree online tool
JSON Schema Generator
Generate a draft-style JSON Schema from sample JSON with nested properties and array item inference.
Free online toolNo signup requiredBrowser-first workflow
Interactive tool
Use Schema Generator
Focused inputs, clear output, and practical defaults for a fast json workflow.
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JSON Schema
1{2 "$schema": "https://json-schema.org/draft/2020-12/schema",3 "type": "object",4 "properties": {5 "name": {6 "type": "string"7 },8 "category": {9 "type": "string"10 },11 "features": {12 "type": "array",13 "items": {14 "type": "string"15 }16 },17 "metadata": {18 "type": "object",19 "properties": {20 "private": {21 "type": "boolean"22 },23 "version": {24 "type": "integer"25 }26 },27 "required": [28 "private",29 "version"30 ],31 "additionalProperties": true32 }33 },34 "required": [35 "name",36 "category",37 "features",38 "metadata"39 ],40 "additionalProperties": true41}Generated schemas are inferred from examples. Review optional fields, formats, enums, and numeric constraints before production use.
Useful for
Common Schema Generator tasks
Bootstrap API schemasDocument sample payloadsCreate validation drafts
Built as a focused browser utility so users can inspect inputs and outputs without a long setup flow.
JSON Schema Generator FAQ
It gives a strong starting point from sample data, but you should review constraints like enums, formats, and optional fields.
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