JSON Schema Validator

JSON Schema is a declarative language that allows you to annotate and validate JSON documents. It describes the shape of your JSON data — what fields are expected, what types they should be, which values are required, and more.

Using JSON Schema, you can define constraints such as:

• Data types: string, number, integer, boolean, array, object
• String patterns, min/max length, enum values
• Numeric ranges (minimum, maximum, exclusiveMin, exclusiveMax)
• Required properties, additional properties
• Nested and conditional schemas (if/then/else, allOf, anyOf, oneOf)

1. Paste your JSON Schema — Enter a valid JSON Schema in the left textarea. You can use the Load Example button to see a working example.
2. Paste your JSON Data — Enter the JSON data you want to validate in the right textarea.
3. Validate — Click Validate to check if your data conforms to the schema. Results appear instantly below.
4. Review errors — If validation fails, each error shows the JSON Pointer path, the schema rule that was violated, and a human-readable message.