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JSON Schema Generator
JSON Schema GeneratorReady
Indent
Sample JSON Data
0 lines · 0 B
Raw input remains untouched until you click Format
Generated JSON Schema (Draft-07)Editable
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Ready to copy (⌘⇧C) or download (⌘S)

JSON Schema Generator

Generate JSON Schema definitions automatically from JSON samples online. Supports Draft-07 and 2020-12 with type inference directly in your browser.

Draft-07 support
Property type inference
Required keys array
Download schema
Step-by-Step Guide

How to Use JSON Schema Generator Online

Follow these quick steps to process your data online directly in your browser with zero latency and 100% privacy.

1
Step 1Infers JSON Schema Draft-07 data types from supplied values.
2
Step 2Builds nested object schemas with recursive property mappings.
3
Step 3Generates the required array containing all top-level keys.
Demonstration

Example Input & Output

Analyzes field names, value types, and array elements to synthesize a complete Draft-07 JSON Schema with a defined properties map and required keys list.

Sample JSON Data
{
  "productId": 42,
  "productName": "Wireless Keyboard",
  "price": 49.99,
  "tags": ["electronics", "hardware"],
  "inStock": true
}
Generated JSON Schema (Draft-07)
{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "properties": {
    "productId": {
      "type": "integer"
    },
    "productName": {
      "type": "string"
    },
    "price": {
      "type": "number"
    },
    "tags": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "inStock": {
      "type": "boolean"
    }
  },
  "required": [
    "productId",
    "productName",
    "price",
    "tags",
    "inStock"
  ]
}
Applications

Common Use Cases

OpenAPI / Swagger Specs

Create payload validation schemas for REST API documentation.

Form Validation

Build schemas for dynamic form generators like react-json-schema-form.

Guidelines

Specifications & Gotchas

Integer vs Number

Whole numbers are inferred as integer while decimals are typed as number.

Knowledge

Frequently Asked Questions

What version of JSON Schema is generated?

The generator outputs standard JSON Schema Draft-07 compatible with OpenAPI 3.0 and modern validators.

Can I customize required properties?

The generated schema includes all root properties in the required array, which you can easily adjust.

Workflow

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Format and beautify JSON online with customizable indentation, key sorting, and instant syntax validation. 100% private browser-based formatting.

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