JSON Schema Validator Online — Validate JSON Against Draft-07 Schema

JSON Schema Validation vs JSON Syntax Validation

There are two levels of JSON validation:

Syntax validation — Is this text valid RFC 8259 JSON? (Does it parse?)
Schema validation — Does this JSON object match an expected structure? (Do all required fields exist with the right types?)

JSON Schema validation is the more powerful of the two — it can enforce field types, required properties, string formats, numeric ranges, and array constraints.

What JSON Schema Draft-07 Can Validate

required — enforce mandatory fields
type — string, number, integer, boolean, object, array, null
format — email, date-time, uri, uuid
minimum / maximum — numeric range constraints
minLength / maxLength — string length constraints
pattern — regex pattern matching
enum — allowed value enumeration

Frequently Asked Questions

What JSON Schema draft does the validator support?

The generator produces Draft-07 schemas, the most widely supported version compatible with AJV, Fastify, and OpenAPI 3.0.

How do I validate JSON against my own schema?

Use our JSON Schema Generator to infer a schema from your sample JSON, then validate new data against that schema.

Can JSON Schema validate email addresses?

Yes. Use "format": "email" in the property definition. AJV with the ajv-formats plugin enforces email, date-time, uri, and uuid formats.

JSON Schema Validator: Validate Data Against Draft-07 Schemas