Does this implement every JSON Schema keyword?
It supports common validation keywords, but not the entire JSON Schema specification. Check support notes in the playground before relying on less common features.
JSON Schema Playground
v2 secureDeveloper Utility
JSON Schema Playground - Generate and Validate JSON Schema
Generate an editable JSON Schema from a sample and validate JSON instances with clear field-level errors.
Paste the JSON instance to turn into a schema or validate against one.
Edit the schema directly. Common type, object, array, enum, composition, format, and size/value constraints are supported.
Generate a schema or validate data to see results here.
Generate a useful starting JSON Schema from an example value, then edit the schema and validate a JSON instance against it.
Inference marks observed object keys as required. Validation runs locally and reports paths and constraint failures.
How to Use This Tool
- Paste a JSON instance and select Generate schema from JSON.
- Edit the generated schema or enter your own JSON Schema.
- Choose Validate JSON to see errors or a successful validation result.
- Copy the schema for use in your project.
Schema inference and validation
The generator infers JSON types, nested object properties, array item shapes, and required keys from the provided sample. The result is an editable starting point rather than a complete description of every possible value.
The local validator supports common types, required properties, nested properties, arrays, enum, const, and basic string, numeric, and array size limits.
Frequently Asked Questions
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