Screen Share Test
Test screen sharing online with a live browser preview. Check source type, resolution, frame rate and sharing status before a WebRTC call or meeting safely.
Screen preview
Not sharingTest screen sharing before a call or meeting
This screen share test uses the browser display-capture API to confirm that your browser can request and preview a screen, browser tab or application window. Start the test, choose a source in the browser permission dialog and confirm that the selected content appears in the local preview. The diagnostic also shows the display-surface type, captured resolution and frame rate when those settings are exposed by the browser.
What a successful screen share test means
If the preview appears and the status changes to sharing active, the browser successfully created a display media track. That is a useful browser-side check before joining a video meeting or testing a WebRTC application. It does not prove that a particular conferencing service can publish the stream over the network, because remote sending also depends on the application, codecs and connectivity.
Permission and privacy behavior
Screen sharing always requires explicit user interaction. This page does not attempt to bypass the browser picker, remember a previously selected screen or start capture automatically. When you press Stop Sharing, when the browser sharing indicator is stopped, or when the shared track ends, the local preview is released. You can also check your webcam, microphone and full WebRTC readiness before a call.
Screen share test FAQ
Does this screen share test upload my screen?
No. The selected display stream is previewed locally in your browser by this tool. The current implementation does not upload the shared screen to a server.
Why does the browser ask me to choose a screen every time?
Browsers require a user gesture and explicit permission for display capture. A website cannot silently start sharing your screen or permanently choose a display source for you.
Why is the reported screen resolution different from my monitor resolution?
The browser reports the settings of the captured track. Scaling, browser behavior, the selected window, and capture constraints can produce dimensions that differ from the physical display resolution.