If your webcam works in a browser test but not in Zoom or Microsoft Teams, first close the test and select that same camera inside the meeting application. Then check permission for the meeting app itself. Permission granted to a browser does not automatically grant access to a separate desktop program.
This guide starts with a working browser preview. If the camera also fails there, use the separate browser webcam troubleshooting guide. Keeping those two starting points separate avoids replacing a driver before checking a simple application setting.
What a successful browser test proves
A moving preview establishes that the selected device supplied video to that browser under the conditions of the test. It is useful evidence against a completely disconnected camera. It does not prove that Zoom or Teams selected the same source, has permission to use it, can open it simultaneously, or is transmitting video into a meeting.
Browser capture also has its own settings and constraints. The W3C Media Capture and Streams Candidate Recommendation distinguishes a source from the tracks and settings requested by its consumers. Two applications can ask the same camera to operate differently.
Run a controlled handoff
- Open Online Webcam Test, select the intended camera, and confirm that the picture responds when you move.
- Note the device's displayed name. A laptop can offer an internal camera, an external USB webcam, and a virtual source.
- Stop the test and close its tab. Quit other camera, recording, and meeting applications.
- Open only the meeting application you want to diagnose.
- Select the same device and check its own preview before joining a call.
Do not leave the working test running as a permanent comparison. It may be another consumer competing for the device. A browser window that is hidden behind the meeting app can still contain an active camera tab.
Follow the symptom inside the meeting app
On narrow screens, scroll the table horizontally.
| Meeting-app result | Next check | What it does not establish |
|---|---|---|
| The camera is absent from the list | Device selection, application permission, reconnecting the USB device | That the hardware is broken |
| The camera is listed but cannot start | Other camera consumers and restarting the app | That another application released its capture session |
| The picture is black or shows an unexpected scene | Selected physical versus virtual camera, shutter, and lighting | That the app is using the camera tested in the browser |
| The app preview works but other people see no video | Start-video control, meeting restrictions, and meeting connectivity | That the outgoing meeting stream works because local capture works |
Check Zoom's selected camera
Open Zoom's video settings and choose the physical camera that passed the browser test. During a meeting, the menu beside the video control provides camera selection. Check whether video is stopped rather than assuming a missing picture is a capture failure.
If Zoom lists a virtual camera, compare it with the physical webcam. A virtual source may require a separate application and an active scene. Selecting it without that upstream setup can produce a blank picture even while the physical camera works.
Zoom's April 2021 camera guidance recommends checking the selected device, closing other camera users, and checking operating-system permissions. Restart the application after correcting those settings. Escalate to an official reinstall or manufacturer driver check only if the focused checks do not resolve the failure.
Check Teams separately
In Teams, open your profile menu, then Settings and Devices. Check the camera shown there instead of relying on whichever device another program remembered. Use the preview to distinguish device capture from problems that occur only after joining a meeting.
Where available in the desktop client, Make a test call provides an additional check of camera, microphone, and speaker operation. Microsoft's April 2021 Teams guidance notes that this test-call feature is not available in Teams on the web. Do not mistake its absence in a browser for a camera failure.
Check the permission that belongs to the failing app
Windows 10
Open Settings, Privacy, Camera. Review device camera access and the applicable application-access controls. If the meeting software is a desktop application, check desktop-app camera access as well. An allowed website cannot override an operating-system block on the program opening the device.
macOS
Open System Preferences, Security & Privacy, Privacy, Camera. Check the entry for Zoom or Microsoft Teams, not only your browser. Quit and reopen the affected application after changing its permission so you can retest from a known starting point.
Meeting in a browser
Check the camera permission for the actual meeting website. A permission decision belongs to a site; allowing Aerod's test is not the same as allowing the meeting's origin. If you cannot find or change the decision, the blocked camera-permission guide helps separate site controls from managed restrictions.
When preview works but the meeting does not
Keep local capture and delivery separate. Check that video is enabled in the meeting and ask whether a host or administrator has restricted it. If the other participant sees a frozen image, record whether your own preview also freezes. Compare a second meeting or the application's test facility without changing the camera at the same time.
That sequence narrows the report: a preview failure concerns opening or rendering the camera; an otherwise working preview with no outgoing video points toward the meeting path. It is a diagnostic distinction, not proof of a particular network fault.
Know when to ask for help
On a managed computer, do not remove security software or bypass organization policies. Give IT or vendor support the operating system, application version, selected camera name, permission state, and whether the camera works in a browser with every other camera app closed. Describe exactly where the image disappears.
If the camera stops working in every application, return to cable, shutter, hardware, and manufacturer support checks. For a working camera with a separate audio problem, use microphone troubleshooting rather than treating video and microphone access as the same permission.
FAQ
Does passing a webcam test prove Zoom or Teams should work?
No. It confirms capture in that browser, not the meeting application's device choice, permission, or outgoing video path.
Should I leave the browser test open while checking Zoom?
Stop the camera and close the test first. Depending on the application and driver, another active consumer can prevent the meeting app from opening the camera.
Why can the meeting preview work while other people see no video?
Local preview and outgoing meeting video are different stages. Check the start-video control, meeting restrictions, and connection before changing camera drivers.