CheckCon - Free HTTP Connection & Response Debugger

CheckCon is a free diagnostic utility designed for testing and debugging internet connections, HTTP requests, and server responses.

It allows you to manually send raw HTTP requests to any host and port, then view the exact response returned - ideal for developers, network engineers, and anyone troubleshooting connectivity or server behaviour.

You can work with a single connection or open multiple tabs to test several endpoints at once. You can save and reload connection tabs as XML, making it easy to repeat tests or share them with colleagues.

Features

• Multiple tabs for testing several connections simultaneously
• Send raw HTTP requests to any host and port
• View full raw responses exactly as returned by the server
• Save and reload tabs as XML for repeatable testing
• Ideal for debugging connectivity, headers, and server behaviour
• Free to use