Format JSON Online Dummy API
A free tool to generate dummy JSON data for testing and prototyping.
About Format JSON Online Dummy API
Format JSON Online's Dummy API provides free, live REST endpoints that return structured JSON data for frontend development, testing, and prototyping. It offers 11+ endpoints covering users, products, orders, categories, and system status, with no authentication or API keys required and CORS enabled for use directly in browser-based applications. The service includes a paginated users endpoint supporting query parameters (page, limit, role, status) for testing list navigation, filtering, and pagination UI patterns.
The endpoints return realistic data shapes intended for use in admin tables, storefront interfaces, dashboards, and profile pages, rather than placeholder data. Example endpoints include user collections and single-user detail responses, product catalogs and categories, order history and analytics, and health/config/status responses for monitoring UI tests.
The product is aimed at frontend developers testing UI states (loading, empty, pagination), instructors building tutorials or courses, and developers creating portfolio demos or client prototypes without building a backend. Users needing a custom data schema can generate and publish their own mock API endpoint through an associated AI JSON Generator tool.
Key features
- 11+ live REST endpoints for users, products, orders, and analytics
- No authentication or API keys required
- CORS enabled for direct browser app requests
- Pagination support with page, limit, role, and status query parameters
- Custom mock API creation via AI JSON Generator
Frequently asked questions
Is this a free API?
Yes, it is free forever with no authentication required.
Do these endpoints support pagination?
Yes, the paginated users endpoint accepts page, limit, role, and status query parameters for testing table navigation and filter states.
Can I use these APIs from a browser-based frontend?
Yes, CORS is enabled so the endpoints can be called directly from browser apps.
Who is this API for?
It is aimed at developers doing frontend testing, learning API integration, building demos, QA, and tutorials.
Can I create a custom API endpoint instead of using the sample data?
Yes, you can use the AI JSON Generator to create a custom JSON structure and publish it as a live mock API endpoint.
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