How accurate is the Cors Tester?

The tool provides precise test results by processing your input locally in the browser. Enter your test parameters, run the test, and review the detailed report. No data is sent to external servers.

Is the Cors Tester free to use?

Yes, this tool is completely free with no signup required. Everything runs locally: Target URL and Request Method are processed on your device, never sent to a server — your data is never uploaded to any server, ensuring complete privacy and security.

Can I use the Cors Tester on mobile devices?

Yes, the tool is fully responsive and works on any device with a modern browser. All testing runs locally, so you get the same accuracy and privacy on mobile as on desktop.

🔍 CORS Tester

Check CORS policies for any URL with custom request methods and headers

⚙️ Request Config

Target URL

Request Method

Custom Headers (one per line: Header-Name: value)

Request Body (JSON, POST/PUT/PATCH only)

📋 Test Results

Waiting for request...

What is Free CORS Tester | No Signup?

Free CORS Tester | No Signup is a free online tool that runs entirely in your browser. No download or signup needed — enter Target URL and Request Method to get results instantly. All data is processed locally.

Use Cases

Verify whether an API allows cross-origin requests before integrating it
Debug CORS errors when building front-end applications
Check Access-Control-Allow-Origin headers on third-party endpoints
Test preflight OPTIONS behavior for custom methods and headers

Key Features

Completely Free: No registration, no limits
Privacy Safe: Data never leaves your browser
Cross-Platform: Any modern browser
Zero Dependencies: Open and use