Click 'Start Test' to test screen sharing. Select a window or screen to share.
Click "Start Test" and select the screen or window to share
Verify the preview shows the correct content
Close sensitive applications before sharing your entire screen
Screen sharing uses the <strong>Screen Capture API</strong> (getDisplayMedia) to capture the contents of your screen, a specific application window, or a browser tab. The browser creates a video stream from the selected source, which can be displayed locally or transmitted over WebRTC for real-time collaboration. Modern browsers render screen content as a MediaStream, the same format used for camera and microphone data.
Screen sharing only transmits visual output — viewers can see your screen but not control it. It's ideal for presentations and demos. Remote desktop allows remote control of the computer, enabling keyboard and mouse input. Screen sharing typically uses less bandwidth since it only needs to send the visual stream, while remote desktop requires bidirectional communication.
When screen sharing, close sensitive applications and notifications to avoid exposing private information. Sharing a specific window or browser tab is safer than sharing your entire screen. For smoother performance, reduce screen resolution temporarily and close resource-heavy applications. Most browsers now show a visible indicator (colored border or icon) when screen sharing is active.
Yes! When you click Start Test, your browser will present options to share your entire screen, a specific application window, or a browser tab. Select "Window" to share only one application.
Screen sharing performance depends on your display resolution and system resources. Try closing unnecessary applications, reducing screen resolution, or sharing a single window instead of the full screen to improve performance.
No. The screen capture is displayed entirely in your browser. No screen data is transmitted, recorded, or stored anywhere. This test only creates a local preview of the captured screen.