API Tester is an online HTTP endpoint testing tool that helps developers quickly test API endpoints. JieBang API Tester supports multiple HTTP methods, auto-formats JSON responses, and generates cURL commands. It's completely free with no registration required.

What to do when encountering CORS errors?

Some APIs don't allow cross-origin requests from browsers due to browser security restrictions. When encountering CORS errors, you can use the tool to generate a cURL command and execute it in the terminal to bypass this limitation.

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API Tester

Test HTTP endpoints directly in your browser with auto JSON formatting and cURL generation

📋 Query Parameters

🔑 Headers

📊 Response

👆 Click "Send" to view response

⚠️ This API doesn't allow cross-origin requests from browsers. Copy the cURL command and run it in your terminal.

📜 Request History Clear

What is API Tester?

API Tester is an online HTTP endpoint testing tool that helps developers test API endpoints directly in the browser. Supports GET, POST, PUT, DELETE, PATCH methods, auto-formats JSON responses, and generates cURL commands. An essential tool for developers to quickly debug APIs.

How to Use API Tester?

Enter the API endpoint URL in the address bar
Select HTTP method (GET/POST/PUT/DELETE/PATCH)
Add Query parameters, Headers, and request body as needed
Click the "Send" button to view response
Responses are auto-formatted with syntax highlighting, supports cURL generation

Common Use Cases

Quickly test if your own API returns correct responses
Debug third-party API endpoints and inspect data structure
Verify an endpoint without installing Postman
Demonstrate API testing to non-technical users

Why Choose JieBang API Tester?

Free to use, no registration required
Pure frontend implementation, data never uploaded to server
Auto JSON formatting with syntax highlighting
One-click cURL command generation for terminal debugging
Request history for quick repeat testing

API Tester

📖 How to Use API Tester

Steps

Enter API URL

Select HTTP Method

Add Parameters and Headers

Send Request

Use Cases