🚀 Online POST Tool / API Tester
Pure frontend HTTP request debugging tool, supports multiple HTTP methods and data formats
Request Configuration
Response Result
Tool Features
Pure Frontend Implementation
Runs completely in the browser, no server required. All HTTP requests are sent through the browser Fetch API, ensuring data privacy and security.
Multiple HTTP Methods
Supports POST, GET, PUT, DELETE, PATCH five HTTP methods, meeting basic RESTful API development needs.
Multi-format Data Support
Supports JSON and form data formats, convenient for testing different types of API interfaces. JSON editor provides syntax highlighting and validation.
Custom Request Headers
Flexibly configure request headers, supports common headers like Content-Type, Authorization, User-Agent, meeting complex API testing requirements.
URL History Record
Automatically saves recently used URLs, convenient for quick switching and repeated testing, improving debugging efficiency.
Real-time Response Preview
Instantly displays HTTP status code, response headers, and response body, supports JSON formatted display, easy to analyze API return results.
Frequently Asked Questions
Does this tool support HTTPS?
Yes, fully supports HTTPS protocol. You can enter any valid HTTPS URL for testing. The tool follows browser security policies.
How to handle cross-origin requests?
Cross-origin requests require the target server to configure CORS (Cross-Origin Resource Sharing) headers. If you encounter cross-origin errors, ensure the API server has configured correct CORS policies, such as Access-Control-Allow-Origin etc.
Does it support file uploads?
Current version mainly supports JSON and form data formats. multipart/form-data format (for file uploads) will be supported in future versions. You can use FormData API with this tool for file upload testing.
Is data saved to the server?
No. All data is saved in your browser's local storage (localStorage), not uploaded to any server, ensuring your API keys and sensitive data security.
Does it support WebSocket testing?
Current version focuses on HTTP/HTTPS request testing. WebSocket testing tool is under development and will be provided in future versions.
Is it suitable for learning HTTP protocol?
Perfect for learning! This tool intuitively displays all components of HTTP requests and responses, an ideal tool for learning HTTP protocol, RESTful API design, and debugging techniques.
Usage Tips
- Use shortcut Ctrl+Enter (Windows) or Cmd+Enter (Mac) to quickly send requests
- JSON data is automatically formatted for easy reading and editing
- Response data can be copied to clipboard for further analysis
- For local development, recommended URL format: http://localhost:port
- Save frequently used API configurations for quick repeated testing