JSON Schema Validator

Validate JSON data payloads against JSON Schema specifications (Draft-04, Draft-07, Draft-2019-09, Draft-2020-12) entirely in your browser using AJV. Checks `type`, `required`, `properties`, `items`, `enum`, `minimum`/`maximum`, `pattern`, and `additionalProperties`.

Why Use This Tool?

• API Request/Response Validation: Validate OpenAPI / Swagger JSON payloads against schemas before API integration.
• Configuration File Auditing: Ensure JSON configuration files conform to strict schema requirements.
• Detailed Error Diagnostics: Pinpoint exact line numbers, missing properties, and invalid data types.

How to Use

1. Paste your JSON Schema into the Schema Editor.
2. Paste JSON Data payload into the Data Editor.
3. View Validation Result: "VALID" or detailed AJV error log highlighting failing fields.

Real Working Example

Input:

Schema: { "type": "object", "properties": { "age": { "type": "integer", "minimum": 18 } }, "required": ["age"] }
Data: { "age": 15 }

Output Result:

Validation Status: INVALID (1 Error Found)
Path: /age
Keyword: minimum
Message: must be >= 18 (received 15)

Important Technical Details & Specifications

• AJV Schema Engine: Powered by AJV (Another JSON Schema Validator), the fastest JSON schema compiler in JavaScript.
• Supports Draft Specifications: Full support for JSON Schema Draft-04, Draft-07, Draft-2019-09, and Draft-2020-12.
• Local Memory Execution: Zero network overhead—sensitive payload data stays private.

Related Data & Format Tools

• JSONPath Tester: Query JSONPath expressions.
• JSON Formatter: Format and validate JSON.
• JSON Visual Tree Editor: Inspect JSON tree structures.