JSON Schema Generator

Generate a draft JSON Schema from a sample JSON object. Free browser-based JSON Schema — no signup, runs locally.

Introduction

JSON Schema Generator is a free, browser-based utility in our JSON Tools collection. Infer a draft JSON Schema from a sample object so you can start validation faster. JSON Schema Generator walks a sample payload and proposes a draft schema. Treat it as a starting point: tighten types, required fields, and formats before you rely on it in CI. Pair with the schema validator to check other samples. Everything runs locally in your browser — inputs stay on your device, with no account or upload required. Highlights include draft schema from a real sample.

Features

Draft schema from a real sample
Nested object and array support
Copy schema for editing in your repo

How to use

1
Paste a representative JSON sample.
2
Generate the draft schema.
3
Review required fields and types, then copy into your project.

Example

From sample

Input

{"id":1,"name":"Ada"}

Output

{ "type": "object", "properties": {.. } }

Benefits

Run JSON Schema entirely in the browser with no signup or installation.
Keep sensitive sample data private — processing never leaves your device.
Draft schema from a real sample
Nested object and array support
Copy schema for editing in your repo
Pair it with JSON Schema and JSON Formatter when your workflow needs adjacent utilities.

FAQs

Usually not yet - review optionality, enums, and formats before shipping.

Generate from a few shapes and merge the stricter rules by hand.

In your browser from the sample you paste.

Yes. JSON Schema on EverydayDevTools is free, with no account, watermarks, or usage caps for normal interactive use.

No. JSON Schema runs in your browser. Your input is processed locally and is not sent to EverydayDevTools servers.

Infer a draft JSON Schema from a sample object so you can start validation faster. It fits everyday json tools tasks when you want a fast local utility instead of installing a CLI or opening a heavy IDE feature.

Core capabilities include: Draft schema from a real sample; Nested object and array support; Copy schema for editing in your repo.

Developers often pair JSON Schema with JSON Schema, JSON Formatter. Open Related tools on this page for quick links.