JSON Schema Generator - Free Online Tool | PivaBox

Generate JSON Schema from JSON data — auto-detects types, formats, and nested structures

How to Use JSON Schema Generator

1. Paste your JSON data into the JSON Input textarea, or click Example JSON to load a sample
2. Configure schema options: Add title, Add descriptions, Required all fields, and Allow additional properties using the checkboxes
3. Click Generate to produce the JSON Schema, then click Copy to copy it to your clipboard

Frequently Asked Questions

Is JSON Schema Generator free?

Yes, PivaBox JSON Schema Generator is completely free to use. There are no charges, subscriptions, or hidden fees. All processing happens locally in your browser.

Are my JSON files uploaded to a server?

No. All schema generation runs entirely in your browser using JavaScript. Your JSON data never leaves your device, ensuring your data stays private and secure.

What JSON Schema draft does it output?

The generator outputs JSON Schema compliant with the 2020-12 draft. It auto-detects string formats (date, date-time, email, URI, UUID, IPv4), distinguishes integers from numbers, and handles nested objects and arrays — including mixed-type arrays via oneOf.