This flashes bright colors very fast. Don’t use it if you are sensitive to flashing light.
Clear image retention
This can fade temporary image retention, but it can’t fix permanent burn-in. Noise flickers fast, so skip it if flashing light affects you.
Screen light
Start test tones at a low volume, especially with headphones, and skip the pixel fixer and the noise pattern if flashing light affects you. These tests check your devices, not your hearing or eyesight.
An online webcam test that starts with one tap: the preview shows within a second or two, with the real resolution, such as 1280 × 720, and the measured frame rate. Try 1080p or 4K to see what your camera can do, then save a snapshot to check sharpness.
How to use
- Pick a tab: Microphone, Webcam, Speakers or Screen.
- Microphone: press Test microphone and allow access. Speak — the meter, wave and status show whether sound arrives. Record 5 s to hear yourself.
- Webcam: press Start camera and allow access. The badge shows the real resolution and measured frames per second; switch cameras or resolutions below.
- Speakers: tap Left, Center or Right. Use the frequency slider or the sweep to check bass and treble.
- Screen: tap a color or start the full-screen test, then tap or press → to step through colors. Look for dots that don’t match.
- The browser asks for permission only after you press a start button. Audio and video never leave your device; recordings are kept in memory until you close the page.
- If no sound is detected, check the mute switch on your headset, the input level in your system sound settings and that the right device is selected.
- Out of phase should sound thin and hard to place. If In phase sounds that way instead, one speaker’s wires are swapped.
- A dead pixel stays black on every color; a stuck pixel stays red, green or blue. The fixer may help stuck pixels after 5–10 minutes, but it can’t repair dead ones.
Resolution and frame rate
Webcams advertise a maximum, but what you get depends on the camera, the USB port, the browser and the light. The badge shows the real resolution, for example 1280 × 720 (720p) or 1920 × 1080 (1080p), and the frames per second measured from the live video. Most webcams aim for 30 fps; in a dim room many drop to 15 fps or lower because they lengthen the exposure to gather light.
If you choose 1080p and still get 720p, the camera or browser could not provide it; try another USB port (USB 3 for 4K cameras), close other apps using the camera and add light in front of you.
When the camera doesn't start
Only one app can usually use a camera at a time, so close video call apps and other browser tabs first. Check the privacy shutter or the camera key on laptops, then the browser's site permission and, on Windows and macOS, the camera privacy settings for your browser. On phones, use the switch button to change between front and back cameras.
Frequently asked questions
How do I test my webcam?
Press Start camera and allow access. The live preview appears with the real resolution and frame rate; use the list to switch cameras.
Why is my webcam frame rate low?
Usually because the room is dark: many webcams halve their frame rate to expose longer. Add light in front of you or lower the resolution.
Why does my webcam look mirrored?
Previews are often mirrored so movement feels natural, like a mirror. Others usually see you unmirrored. Press M to toggle the mirror here.
Is the video recorded?
No. The preview runs only in your browser. A snapshot is saved only when you press the button, as a file on your device.
What resolution is my webcam?
The badge shows the resolution the camera is actually sending. Pick a higher option to see whether it supports 1080p, 1440p or 4K.