JSON Schema Generator

1. Paste JSON data in the left input box, or click Sample to load example data
2. Configure options: set Schema ID, choose whether all fields are required, add default values, etc.
3. The corresponding JSON Schema definition is generated automatically on the right
4. Click Copy to copy the generated Schema to clipboard
5. Use the Schema for API validation, form validation, or config file verification

Simple Object Schema

输入 JSON：
{
  "name": "张三",
  "age": 28,
  "isActive": true
}

输出 JSON Schema：
{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "description": "Object with 3 properties",
  "properties": {
    "name": {
      "type": "string",
      "description": "String value"
    },
    "age": {
      "type": "integer",
      "description": "Number value"
    },
    "isActive": {
      "type": "boolean",
      "description": "Boolean value"
    }
  },
  "required": ["name", "age", "isActive"]
}

Nested Objects and Arrays

输入 JSON：
{
  "user": {
    "id": 1,
    "profile": {
      "avatar": "url",
      "skills": ["JS", "TS"]
    }
  }
}

输出 JSON Schema：
{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "properties": {
    "user": {
      "type": "object",
      "properties": {
        "id": { "type": "integer" },
        "profile": {
          "type": "object",
          "properties": {
            "avatar": { "type": "string" },
            "skills": {
              "type": "array",
              "items": { "type": "string" }
            }
          }
        }
      }
    }
  }
}

Data Validation Example

使用 Ajv 验证数据：

const Ajv = require('ajv');
const ajv = new Ajv();

const schema = { /* 生成的 Schema */ };
const validate = ajv.compile(schema);

const validData = { name: "李四", age: 25, isActive: false };
const invalidData = { name: "王五", age: "三十" };

console.log(validate(validData));    // true
console.log(validate(invalidData));  // false
console.log(validate.errors);        // 错误详情