API Tester

Test REST APIs with all HTTP methods, headers, and body

What is API Tester?

The API Tester is a free online tool that lets you send HTTP requests to any API endpoint directly from your browser and inspect the response, without needing to install Postman, curl, or any other software. Testing APIs is a daily task for developers building integrations, debugging backend services, verifying authentication, and exploring third-party APIs. This tool supports all standard HTTP methods including GET, POST, PUT, PATCH, and DELETE, lets you add custom headers like Authorization and Content-Type, and accepts JSON or form-encoded request bodies. The response panel shows the status code, response headers, and formatted response body so you can immediately see whether your API call succeeded and what data was returned. It is the fastest way to test an API endpoint without writing any code.

Why Use DevBench API Tester?

DevBench API Tester runs entirely in your browser — your data never leaves your device. No sign-up, no limits, no watermarks, completely free forever.

How to Use API Tester

  1. Enter API endpoint URL
  2. Select HTTP method (GET, POST, PUT, DELETE)
  3. Add headers and request body if needed
  4. Click "Send Request" to test API
  5. View response status, headers, and body

Examples

  • Test GET request to fetch data
  • Send POST request with JSON payload
  • Test API authentication with headers
  • Send PUT request to update data
  • Test DELETE request to remove data

Use Cases

  • Testing REST API endpoints
  • Debugging API responses
  • Testing API authentication
  • Sending test API requests
  • Debugging API errors
  • Testing API headers
  • Sending JSON payloads
  • Testing API rate limits
  • Debugging CORS issues
  • Testing API integrations

Frequently Asked Questions

What HTTP methods are supported?

Supports GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS methods.

Can I add custom headers?

Yes, add any custom headers including Authorization, Content-Type, and API keys.

Does it support authentication?

Yes, add Authorization header with Bearer token, API key, or Basic auth credentials.

Can I test GraphQL APIs?

Yes, use POST method with GraphQL query in request body and Content-Type: application/json.

Are requests logged?

No, all requests are made from your browser. No data is logged or stored on servers.

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