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JSON Schema Generator

Generate a JSON Schema automatically from JSON data.

How to Use This Tool

  1. Paste a sample JSON payload.
  2. Click Generate schema.
  3. Copy and refine the output.

Learn More About JSON Schema Generator

Why use JSON Schema?

JSON Schema helps validate JSON data, document APIs, and enforce consistent structures across systems.

About JSON Schema Generator

JSON Schema describes the structure of JSON data. This generator infers a schema from sample JSON so you can validate payloads, document APIs, or enforce consistency in configuration files.
Generate JSON Schema from example JSON data.
Schema draft
2020-12
Runs in browser
Yes
Output format
JSON

Examples

Generate schema for a user object

Create a schema from a small JSON sample.
Input
{"id":1,"name":"Ava"}
Output
{
  "type": "object",
  "properties": { ... }
}

Features

Automatic schema inference

Infers types for objects, arrays, and primitives.

Draft 2020-12 schema

Outputs a schema with a modern $schema declaration.

Editable output

Copy and customize the generated schema.

Use Cases

  • Generate schemas for API validation.
  • Create documentation for JSON payloads.
  • Standardize JSON configuration formats.

Frequently Asked Questions

Related Tools

Validate your data with the schema once generated.