How to Use the OnlineMicTest Webcam Test

OnlineMicTest has a browser-based webcam test that shows whether your camera is detected, whether your browser can use it, and whether the picture looks right before a video call or recording. This guide explains how to run the test, how to read what it shows, and what to do when the preview does not appear.

Before you start

You need a connected camera, either built in or plugged in by USB, and a current version of a desktop or mobile browser. Close video calling, streaming and recording apps first. On some systems only one app can use the camera at a time, and the test page may show nothing while another program holds it.

The test page loads from the web, so opening it requires an internet connection. This guide does not assume whether your video stays inside your browser or is sent anywhere. Check the site's own privacy information if this matters to you, and keep documents, screens and other sensitive items out of the frame during the test.

Step-by-step instructions

• Open the OnlineMicTest webcam test page in your browser, for example by searching for the site name and choosing its webcam test.
• If the page shows a button to start the test, select it. Some pages ask for camera access as soon as they load.
• When the browser asks for camera permission, choose Allow. The wording varies between browsers, and some let you allow access only once instead of remembering the choice.
• Check that the selected camera is the one you want to test. If your device has more than one camera, use the camera choice in the permission prompt, in the browser's site settings, or on the page itself if it offers one.
• Watch the live preview. Move your hand in front of the lens to confirm the image updates in real time.
• Write down any details the page reports, such as resolution or frame rate, so you can compare them later.

Browsers grant camera permission per site, so this step is easy to undo. After testing, you can remove or change the permission in the browser's site settings, usually opened from the icon next to the address bar. Chrome, Edge, Firefox and Safari word their prompts and settings differently, but each lets you allow, block or reset camera access for a single site.

Your operating system must also allow your browser to use the camera. On Windows 11, check Settings > Privacy & security > Camera. On recent macOS versions, check System Settings > Privacy & Security > Camera. On older macOS versions, look under System Preferences > Security & Privacy > Privacy. On phones and tablets, camera access for the browser is managed in the system app settings.

Check the output

A successful test shows a live, moving image from the camera you intended to use, with no long freezes. Many previews are mirrored like a reflection. Whether other people on a call see a mirrored image depends on the calling app, not on this test.

If the page reports resolution and frame rate, treat these numbers as what the browser received during this session, not necessarily the camera's maximum. A browser or calling app can request a lower mode than the camera supports. Many webcams also lower their frame rate in dim light to collect more light per frame. Compare the reported values with the camera's specifications, and do not expect a video call to use the same settings.

Use the preview to judge lighting. Face a window or lamp rather than sitting with a bright light behind you, which tends to darken your face. Watch for noise, blur or color casts. These usually come from lighting or a dirty lens rather than from the test.

Common problems and next steps

Black screen or no preview: confirm that camera permission is allowed for the site in your browser and for the browser in your operating system. Close any other app that might be using the camera. Check for a physical privacy shutter or a keyboard key that turns the camera off, which some laptops have.

No permission prompt appears: you may have blocked the site earlier. Reset its camera permission in the browser's site settings and reload the page. Browsers only allow camera access on secure pages, so make sure the page opened over HTTPS.

Wrong camera shown: change the selected camera in the site's permission settings or in the browser's camera settings, then reload. Virtual camera software can also appear as a device and may be chosen by default, so pick your physical camera explicitly.

The camera works in the test but not in a calling app: the test only confirms browser access. A desktop calling app has its own camera selection and needs its own operating system permission, so check both in that app and in the system privacy settings.

No browser can see the camera: test it with a built-in camera app, such as Camera on Windows or Photo Booth on macOS. If it fails there too, try another USB port or cable, update the camera driver or system software, and check whether the device appears in your system's hardware list.