Upload CSV, auto-generate mock REST API responses with pagination, filtering, sorting
Zero Dependencies Β· Works Offlineπ Upload CSV Data
Drag & drop CSV file here, or click to select
Supports .csv / .tsv / .txt files
βοΈ API Configuration
π API Endpoints
Parse CSV to see available API endpoints
π Response Preview
What is CSV to REST API?
CSV to REST API is an online tool for developers that quickly converts CSV data into mock REST API response format. After uploading or pasting CSV, it auto-parses headers and data rows, generating JSON API responses following RESTful conventions with pagination, field selection, filtering, and sorting support β ideal for front-end development and API prototyping.
Core Features
- Smart CSV Parsing: Auto-detects delimiters (comma/Tab/semicolon), supports quoted fields and embedded newlines
- RESTful API Format: Generates standard REST responses with data array and pagination info (total/page/pageSize/totalPages)
- Pagination/Filter/Sort: Supports ?page=1&pageSize=10, ?field=value filtering, ?sort=name&order=asc sorting
- Multi-format Export: Export as JSON data, OpenAPI 3.0 spec, or fetch/axios request code
- Custom Configuration: Set resource name, ID field, page size to match your project conventions
How to Use
1. Drag & drop a CSV file to the upload area, or paste CSV content directly. The tool auto-detects the delimiter and parses.
2. Configure API parameters: set resource name (e.g., users, products), select ID field, adjust page size.
3. View API endpoint preview with available query parameters and URL format. Response preview shows JSON API response data.
4. Export your preferred format: JSON data for frontend mocking, OpenAPI doc for API design, or request code for project integration.
Use Cases
Case 1: Frontend API Mocking
Frontend developers generate Mock API responses from business CSV data, developing and debugging without a live backend.
Case 2: API Prototyping
Product managers or architects quickly generate API doc prototypes from Excel-exported CSV for team design discussions.
Case 3: Data Migration Verification
Convert legacy system CSV exports to API format to verify data presentation in new system APIs.
Case 4: Teaching REST APIs
Demonstrate REST API concepts with real CSV data showing response formats and query parameter effects.
Technical Background
REST (Representational State Transfer) is an API design style with core principles including resource orientation, uniform interface, and stateless communication. Standard REST APIs use HTTP methods (GET/POST/PUT/DELETE) to operate on resources with JSON responses. Pagination is critical for large datasets, with common approaches being offset-based (page+pageSize) and cursor-based. OpenAPI (formerly Swagger) is a REST API description spec for auto-generating docs, client code, and test cases. The OpenAPI 3.0 documents from this tool can be imported directly into Swagger UI or Postman.
β Which CSV formats are supported?
Standard CSV with auto-detected delimiters (comma/tab/semicolon), supports quoted fields.
β What API features are supported?
Pagination, field selection, filtering, sorting, and single record query.
β Is data uploaded?
No, all processing happens locally in your browser.
β What's the max file size?
Recommended under 10MB (~100K rows) for best performance.
β Can I customize endpoints?
Yes, customize resource name, ID field, page size and more.
β Can I export the API?
Yes, export as JSON, OpenAPI 3.0, or fetch/axios code snippets.