JSON Buddy Logo

JSON Schema Generator

Automate Validation

Instantly generate a **JSON Schema** from your JSON data. Create strict validation contracts for your APIs and configuration files.

Schema Generator
Input JSON
JSON Schema

What is a JSON Schema Generator?

A **JSON Schema Generator** is an automated tool that analyzes a JSON object and reverse-engineers a structural definition (schema) for it. Instead of manually writing rules like "id must be a number" or "email is required", the generator scans your data sample and produces a precise **JSON Schema** entry that enforces these types, helping you validate future data consistency.

How to Generate a Schema

  1. 1

    Input Sample Data

    Paste a representative JSON object from your application or API response into the editor.

  2. 2

    Generate Schema

    The tool analyzes keys, value types (string, integer, boolean), and array structures to build a comprehensive schema definition.

  3. 3

    Use for Validation

    Copy the output and use it with libraries like `Ajv` (Node.js) or `Newtonsoft.Json.Schema` (.NET) to strictly validate incoming data.

Features

Draft 07 Compliant

We produce standard-compliant schemas ensuring broad compatibility with the entire JSON ecosystem and validator tools.

Type Inference

Our engine intelligently detects data types including nested objects and arrays, saving you hours of manual definition work.

API Documentation

Use generated schemas as a cornerstone for your OpenAPI/Swagger documentation, making your API easier to consume.

Frequently Asked Questions

Explore Other Tools