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API Tester

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📖 How to Use API Tester

Steps
1
Enter API URL

Type the complete API endpoint URL in the address bar

https://api.example.com/users
2
Select HTTP Method

Choose HTTP method based on API docs: GET retrieve, POST create, PUT update, DELETE remove

GET / POST / PUT / DELETE
3
Add Parameters and Headers

Add Query parameters or request headers, fill request body for POST/PUT

Content-Type: application/json
4
Send Request

Click Send button to view response, supports cURL command generation

Send Request
💡 Encountering CORS error? Copy cURL command and run in terminal
Use Cases
🔧 API Development

Quickly test if your API returns correct responses

📦 Third-party APIs

Debug third-party APIs and inspect response data structure

🎯 Quick Verification

Verify an endpoint without opening Postman

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?

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

Common Use Cases

Why Choose JieBang API Tester?

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Decode JWT tokens

 Regex Tester

Test regex patterns

Frequently Asked Questions

What is a regex tester?

A regex tester lets you write and test regular expressions against sample text in real-time, highlighting matches as you type.

How to test an API endpoint?

Enter the URL, select HTTP method (GET/POST/PUT/DELETE), add headers and body, then click Send. JieBang's API Tester shows the response instantly.

Are developer tools free?

Yes, all JieBang developer tools are 100% free — JSON formatter, Base64 encoder, regex tester, API tester, cron validator, and more.

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