Is JSON Schema Validator free?

Yes. JSON Schema Validator runs entirely in your browser. No data is uploaded or stored.

Does JSON Schema Validator work offline?

Yes. Once loaded, JSON Schema Validator works fully offline except for the QR code generator which uses a pinned CDN with SRI.

Local-only · nothing leaves your browser

How do I validate JSON against a schema?

Paste a JSON Schema and your JSON data to validate it instantly. Supports required fields, types, enums, nested objects, arrays, min/max, patterns, and more. Runs entirely in your browser.

JSON Schema

JSON Data

⚠ JavaScript is required for this tool — the page content above works without it.

F.A.Q. — Questions, answered

What is JSON Schema Validator?Paste a JSON Schema and your JSON data to validate it instantly. Supports required fields, types, enums, nested objects, arrays, min/max, patterns, and more. Runs entirely in your browser.
Is JSON Schema Validator free?Yes. JSON Schema Validator runs entirely in your browser. No data is uploaded or stored.
Does JSON Schema Validator work offline?Yes. Once loaded, JSON Schema Validator works fully offline except for the QR code generator which uses a pinned CDN with SRI.

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