JSON Schema Generator & Validator

Infer a draft-07 JSON Schema from sample data, then validate JSON against it — all in-browser.

Infer a draft-07 JSON Schema from sample data, then validate JSON against it — all in-browser. Free and 100% private — runs entirely in your browser, nothing is ever uploaded.

About JSON Schema Generator & Validator

JSON Schema Generator & Validator is a free, browser-based developer utility that lets you infer a draft-07 JSON Schema from sample data, then validate JSON against it — all in-browser. Because it runs entirely on your device, there’s nothing to install, no account to create, and your data is never uploaded to a server.

How to use JSON Schema Generator & Validator

  1. Open JSON Schema Generator & Validator — it loads in any modern browser, with no sign-up.
  2. Paste or type your input.
  3. Get the result instantly, processed locally on your device.
  4. Copy or download the output — what you entered is never sent anywhere.

Frequently asked questions

Is JSON Schema Generator & Validator free?
Yes — JSON Schema Generator & Validator is completely free, with no account, sign-up or usage limits.
Is my data private?
Yes. JSON Schema Generator & Validator runs 100% in your browser, so your files and text are processed on your own device and never uploaded.
Do I need to install anything?
No — JSON Schema Generator & Validator works in any modern desktop or mobile browser with nothing to download.