ZeroServer.tools

JSON Schema Generator

Paste a JSON example and get a JSON Schema (Draft 2020-12) instantly.

JSON input

JSON Schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "name": {
      "type": "string"
    },
    "age": {
      "type": "integer"
    },
    "email": {
      "type": "string",
      "format": "email"
    },
    "tags": {
      "type": "array",
      "items": {
        "oneOf": [
          {
            "type": "string"
          },
          {
            "type": "string"
          }
        ]
      }
    },
    "address": {
      "type": "object",
      "properties": {
        "street": {
          "type": "string"
        },
        "city": {
          "type": "string"
        },
        "active": {
          "type": "boolean"
        }
      },
      "required": [
        "street",
        "city",
        "active"
      ],
      "additionalProperties": false
    }
  },
  "title": "Root",
  "required": [
    "name",
    "age",
    "email",
    "tags",
    "address"
  ],
  "additionalProperties": false
}

Generate JSON Schema from example JSON

This tool analyzes your JSON and infers a Draft 2020-12 JSON Schema — including types, required fields, nested objects, arrays, and common string formats (email, URI, date). It's a starting point; review and adjust the schema for your API or validation needs. To explore the structure visually, use JSON Tree Viewer. To format raw JSON, try JSON Formatter.

Private & free — this tool runs entirely in your browser.