JSON Schema Validator
Validate JSON objects against JSON Schema rules and required property definitions.
JSON Schema Validator
About JSON Schema Validator
The JSON Schema Validator validates JSON documents against JSON Schema Draft-07, Draft-2019-09, and Draft-2020-12 specifications, reporting property-level schema violations, type mismatches, and required field errors with line indicators.
How to Use JSON Schema Validator
Step 1
Paste your JSON data into the Data pane.
Step 2
Paste your JSON Schema definition into the Schema pane.
Step 3
Inspect the validation status badge (VALID / INVALID).
Step 4
Review any reported property mismatches and line numbers.
Practical Use Cases for JSON Schema Validator
API Payload & Contract Testing
Verify incoming REST and webhook JSON payloads against formal JSON Schema definitions before database persistence.
Configuration File Linting
Validate complex configuration files (`tsconfig.json`, `package.json`, VS Code settings) against their official schemas.
Input & Output Examples
Validating User Object against Schema
JSON: {"name": "Alex", "age": "thirty"} | Schema: {"type": "object", "properties": {"age": {"type": "integer"}}}Validation Failed (1 Error): Property `/age` must be of type `integer` (received `string`)
Key Features & Performance
- ✓Supports JSON Schema Draft-04, Draft-06, Draft-07, Draft-2019-09, and Draft-2020-12.
- ✓Detailed error reporting: schema path, instance path, error keyword, and helpful fix message.
- ✓Dual interactive code editors with live JSON syntax validation.
- ✓100% Client-Side memory execution guarantees data confidentiality.
- ✓1-Click Copy validation report.
Key Terminology & Definitions
JSON Schema
A declarative JSON-based format for describing and validating the structure, constraints, and data types of JSON documents.
Instance Path (JSON Pointer)
An RFC 6901 string identifying the exact location of a property within a JSON document (e.g. `/users/0/email`).