Tool navigation

Browser-based tool

JSON Schema Validator

Validate JSON documents against a JSON Schema to ensure data quality.

JSON Schema Ready

JSON to Validate Input

Validation Result

Click Validate to check your JSON against the schema...

Is this JSON tool free?

Yes. It is free to use, and it runs right in the browser.

Is my JSON uploaded anywhere?

No. Your JSON stays in the page. Formatting, validation, comparison, and conversion all happen locally.

Which JSON Schema dialects are supported?

Draft 7, Draft 2019-09, and Draft 2020-12 are all supported.

Can I save my schema?

Your schema stays in the browser, use copy/paste to save it locally.

Validate API inputs before they hit your database or logic.

Document expected data structure for consumers of your API.

Generate type definitions and documentation from schemas.

Draft 7, 2019-09, and 2020-12 are the most common versions.

This tool supports multiple dialects for maximum compatibility.

Check JSON syntax and catch parser errors before the payload goes any further.

Format JSON with clean indentation so logs, payloads, and fixtures are easier to read.

Good to know

Paste your input at the top and the result shows up right below. The FAQ and related tutorials are there if you want more.

Most tools run entirely in your browser.
Your input isn't sent to a server unless a tool says it makes a network request.
Related tools and tutorials sit below when a task usually needs a follow-up.