JSON Schema Validator
UtiliStudio Workspace ToolValidate JSON payloads against JSON Schema specifications. Get precise error reporting with JSON pointers, line numbers, and schema auto-generation.
Key Capabilities
JSON Schema Draft 2020-12 Support
Validate documents against modern JSON Schema standards, including type constraints, required fields, patternProperties, and combinators.
Pinpoint Error Feedback
Receive actionable diagnostic feedback indicating the exact line coordinates, JSON pointer path, and failing schema keyword.
Automatic Schema Generation
Infer a structured JSON Schema Draft 2020-12 definition directly from existing sample JSON data to accelerate schema authoring.
Semantic Format Validation
Check data formats such as email, URI, date-time, UUID, IPv4, and IPv6 alongside custom regex patterns and numeric boundaries.
How to Use JSON Schema Validator
Enter JSON document and schema
Paste your JSON data into the payload editor and your JSON Schema into the schema editor pane.
Run schema validation
Click Validate to evaluate payload conformance against declared types, required properties, and constraints.
Review validation diagnostics
Inspect the diagnostic drawer for green validation passes or red constraint violations with line numbers.
Generate or export schema
Use the Schema Generator to infer types from sample payloads or export validated schema files.
Practical Examples
Validating a User Profile against Schema Constraints
A JSON payload validated against required properties and email format constraints.
Payload:
{
"id": 101,
"email": "user@example.com",
"active": true
}
Schema:
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"required": ["id", "email"],
"properties": {
"id": { "type": "integer" },
"email": { "type": "string", "format": "email" },
"active": { "type": "boolean" }
}
}Validation Result: PASS
Total Errors: 0
All 3 properties conform to schema constraints.Common Use Cases
API Request & Response Testing
Verify that REST API payloads conform to OpenAPI or JSON Schema specifications during development.
Webhook Payload Verification
Ensure incoming webhook notifications match expected third-party schema contracts before writing handler logic.
Configuration File Validation
Validate structured project configurations against predefined schemas to prevent runtime deployment failures.
Schema Authoring & Prototyping
Generate initial draft schemas from raw JSON examples and refine property types iteratively.
Frequently Asked Questions
Which JSON Schema draft specifications are supported?
The validator supports modern JSON Schema specifications including Draft 2020-12 and core keywords established in Draft 7.
How are schema errors displayed?
Diagnostics pinpoint the specific JSON pointer path (such as /users/0/email), the violated keyword (such as format or required), and the editor line number.
Can I generate a schema from sample JSON?
Yes. The built-in Schema Generator analyzes sample JSON data types and structures to produce an initial Draft 2020-12 schema automatically.
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Ready to use JSON Schema Validator?
Launch the full workspace tool directly in your browser.