- Paste your JSON data or click Load Demo to try with sample data
- Select the JSON Schema draft version you need
- Toggle Include Required to add required field constraints
- Copy the generated schema or download as a file
- Use the schema for API validation, documentation, or code generation
What JSON Schema draft version should I use?
Draft 07 is the most widely supported and recommended for most use cases. Draft 2020-12 is the latest version with new features like $dynamicRef. Use Draft 04 only for legacy systems that require it.
How does the tool detect data formats?
The generator automatically detects common formats including email addresses, URLs, date-time strings (ISO 8601), dates, and UUIDs. These are added as format hints in the schema to provide additional validation.
What does Include Required do?
When enabled, all non-null properties in your JSON will be marked as required in the generated schema. This is useful for strict API validation where all fields must be present.
Is my JSON data secure?
Yes, all processing happens entirely in your browser. Your JSON data is never sent to any server. You can verify this by using the tool offline after the page loads.
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JSON
JSON (JavaScript Object Notation) is a lightweight, text-based data interchange format that is easy for humans to read and write, and easy for machines to parse and generate. It is based on a subset of JavaScript syntax but is language-independent.
JSON Schema
JSON Schema is a vocabulary that allows you to annotate and validate JSON documents. It describes the structure, constraints, and documentation of JSON data, enabling automated validation and documentation generation.
JSONPath
JSONPath is a query language for JSON documents that enables extracting and filtering data from complex JSON structures using path expressions similar to XPath for XML.