ToolHive

Auto-generate JSON Schema from JSON

The fastest way to generate valid JSON Schema from raw data.

json schema generatorjson to schemaschema makerapi spec generator

Tool module skeleton

No runtime is wired for this tool yet.

Intro

Writing JSON Schema by hand is verbose and error-prone.

This generator analyzes your JSON structure and infers types, required fields, and nesting patterns.

How to use

  1. Paste JSON
    Input your valid JSON sample.
  2. Review Schema
    The schema is generated instantly based on provided keys.
  3. Download/Copy
    Copy the draft schema for your OpenAPI or validation needs.

Examples

User Object
Generate schema for a standard user profile.
Input
{"id": 1, "name": "User"}
Output
{"type": "object", "properties": { ... }}
Nested object schema
Generate a schema for JSON data with nested object properties.
Input
{"user":{"name":"Alice","age":30},"active":true}
Output
{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "properties": { "user": { "type": "object", "properties": { "name": { "type": "string" }, "age": { "type": "integer" } } }, "active": { "type": "boolean" } }
}

FAQ

What is a JSON Schema?

JSON Schema is a vocabulary that allows you to annotate and validate JSON documents. It describes the structure, required fields, and data types that a JSON instance should follow.

How does schema generation work?

The generator inspects your JSON data and infers types, required properties, and default constraints. The resulting schema can validate similar JSON documents against the same structure.

Can I customize the generated schema?

The tool produces a baseline schema from your data. You can add additional constraints like pattern, minLength, or enum after copying the output into your project.

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