Screen Share Test

A free test page that answers one question: can this machine share its screen in a video call? Confirms the browser exposes the Screen Capture API, lets you pick and share a screen, window, or tab, verifies frames are actually flowing, and reports whether system audio came along. Run it before a Teams, Zoom, or Meet screen-share, or when a "cannot share my screen" ticket comes in.

Read the Screen Share Test guide for help reading the verdict or fixing each failure mode.

Privacy: The captured stream stays in this browser tab and is shown only in the local preview. Nothing is recorded, uploaded, or transmitted, and every track is stopped the moment the test ends. View source to verify.

Configuration

Driver: getDisplayMedia (Screen Capture API)

Takes about 15 seconds. You pick what to share; the preview stays on this device and no video leaves your machine.

Status Check Step

Pending

Screen capture is supported

Feature-detecting navigator.mediaDevices.getDisplayMedia and confirming a secure context.

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Pending

You can pick and share a source

Click Start, choose a screen, window, or tab, and confirm frames are flowing in the local preview.

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Pending

System audio can be shared (optional)

Reports whether the shared source included a system-audio track. Informational; support varies by browser and OS.

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