Generate JSON Schema Specifications from JSON

Create Draft-07 and 2020-12 JSON Schemas from sample JSON data with required fields and formats.

JSON to JSON Schema Generator

Generate standard Draft-07 and 2020-12 JSON Schema specifications from sample JSON objects.

JSON Sample Payload

JSON Schema Specification

Set All Fields as Required

Generated JSON Schema (Specification)

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "GeneratedSchema",
  "type": "object",
  "properties": {
    "id": {
      "type": "integer"
    },
    "title": {
      "type": "string"
    },
    "price": {
      "type": "number"
    },
    "inStock": {
      "type": "boolean"
    },
    "tags": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "vendor": {
      "type": "object",
      "properties": {
        "name": {
          "type": "string"
        },
        "contactEmail": {
          "type": "string",
          "format": "email"
        }
      },
      "required": [
        "name",
        "contactEmail"
      ],
      "additionalProperties": false
    }
  },
  "required": [
    "id",
    "title",
    "price",
    "inStock",
    "tags",
    "vendor"
  ],
  "additionalProperties": false
}

About This Tool

JSON to JSON Schema Generator parses sample JSON structures and builds standard JSON Schema specifications with type inference, property declarations, and optional required field constraints.

Key Features

Supports Draft-07 and 2020-12 drafts

Deeply nested object and array item inspection

Configurable required properties enforcement

How to Use This Tool

Paste your sample JSON payload into the input editor.
Select Draft-07 or 2020-12 JSON Schema specification.
Toggle whether all fields should be marked as required.
Copy the generated JSON Schema definition.

Why Use This Tool

Standardize API payloads across microservices and OpenAPI/Swagger documentation.
Supports Draft-07 and 2020-12 specifications.

Pro Tips

Include realistic edge-case sample data in your JSON to generate comprehensive schema constraints

Frequently Asked Questions

What is the difference between JSON Schema Draft-07 and 2020-12?

Draft-07 is the most widely supported schema version across legacy tooling and validators, while 2020-12 includes modern vocabulary modularity and improved dynamic referencing.

Related Tools

API Mock Payload & Fake Data Generator

Generate mock JSON REST API responses for Users, Products, and Paginated datasets.

Linux Chmod Permissions Calculator

Calculate Linux/Unix file permissions visually with octal numbers and symbolic notation.

Cron Expression Descriptor

Convert cron expressions into human-readable text.