JSON Schema Generator
Enter JSON to display the schema here.
Last updated: 2026 · Free online tool
What is JSON Schema Generator?
Free online tool that takes sample JSON data and automatically generates a JSON Schema by inferring types, required fields, and nested structures, ready for API documentation and data validation
How to Use
- 1Enter JSON— Paste JSON data on the left.
- 2Select Options— Set the Draft version, include examples, and format detection options.
- 3View Schema— Review the auto-generated JSON Schema on the right and copy it.
Related Tools
JSON Formatter & ViewerFree online JSON formatter and viewer that beautifies minified or single-line JSON with proper indentation, lets you explore the structure in a collapsible tree view, and flags syntax errors
JSON ValidatorFree online JSON validator that instantly checks whether a JSON string is syntactically valid and, on error, pinpoints the exact line and column with the cause to fix missing commas or quotes fast
JSON Path FinderFree online tool that visualizes JSON data as an interactive tree and, when you click any node, automatically extracts and copies the JSONPath to that value to locate fields in API responses fast
Frequently Asked Questions
JSON Schema Draft-07 and 2020-12 are both supported.
It automatically detects formats like email, URI, date, UUID, and IPv4 in string values and adds the format keyword.
The items schema is generated based on the first element of the array.
All fields that are not null or undefined are included as required.
No. All schema generation is done in the browser.