JSON to JSON Schema
Generate JSON Schema from sample JSON data. Auto-detects formats like email, URL, date-time, and UUID.
// JSON Schema will appear here...Frequently Asked Questions
What is JSON Schema?
JSON Schema is a vocabulary that allows you to annotate and validate JSON documents. It describes your existing data format, provides clear documentation, and enables automated validation of data.
What JSON Schema draft does this generator use?
This generator creates schemas following JSON Schema draft 2020-12, the latest stable specification.
Does it detect string formats automatically?
Yes. The generator auto-detects common formats: email addresses, URLs/URIs, ISO date-time strings, UUIDs, and IPv4 addresses. These are annotated with the appropriate format keyword.
How are nested objects handled?
Nested objects generate nested schema definitions with their own properties and required fields. Each level of nesting is properly represented in the schema hierarchy.
Can I use the generated schema for validation?
Yes. The generated schema works with any JSON Schema validator like Ajv (JavaScript), jsonschema (Python), or any other validator that supports draft 2020-12.
How are arrays handled in the schema?
Arrays of a single type generate an items schema matching that type. Arrays of objects merge all objects into a single schema. Mixed-type arrays use oneOf to represent the union.