Webcam Test (Free, Online)
A free tool to check your webcam feed, resolution, and aspect ratio right in your browser. Switch between multiple cameras and take snapshots — handy for checking your look before a video call or testing a built-in or external camera.
What the webcam test does
This tool previews your camera in the browser alone and shows the **resolution** and the **aspect ratio** alongside it. Where more than one camera is attached — a built-in one and a USB camera, say — you can switch between them and compare, and you can capture the moment as a still. The snapshot can be downloaded.
**The video is shown inside your browser alone; nothing is recorded, saved or sent to a server.** Using a camera requires the browser’s permission, and **it will not work outside a secure connection over HTTPS.** When the camera will not start, more often than not another application — conferencing software, typically — is holding the device; quitting that application releases it.
How to run the test
- Start the camera Press start and choose to allow when the browser asks. Without permission the preview will not begin.
- Choose which camera to use Where you have several, built-in and external, the dropdown lets you switch and compare the field of view and the picture.
- Check the resolution and aspect ratio What appears is the resolution actually being obtained. If it is lower than you expected, look again at the camera’s own settings and at the connection — the USB standard, for one.
- Look at the framing, the light and the angle You can settle, unhurried, where your face sits, whether you are backlit, and what the background is showing.
- Keep a snapshot Capturing a still lets you compare lighting and background as you adjust them. It can be downloaded too.
Tips for getting more out of it
- Check your framing, lighting, and camera angle on this page before a video call so you are not caught off guard once you are live.
- If multiple cameras are connected (built-in plus an external USB camera, for example), use the dropdown to switch between them and compare the results.
- Use "Take Snapshot" to capture a still image so you can calmly review your lighting and background.
- If the feed looks choppy or glitchy, check whether another app is already using the camera or a browser extension is interfering.
Where the test helps
Just before a video call or an interview
Settling the framing, the light and the background beforehand spares you the scramble when it counts.
When you have bought a new camera
You can confirm that it is recognised and that it delivers the resolution you expected.
When the camera shows nothing
The error messages — not permitted, not found, in use by another application — separate the causes.
When arranging lighting and background
Taking snapshots and comparing them makes it easier to settle where the light sits and what the background lets through.
When you also want to check the audio side
For the microphone, see the microphone test; for the speakers, the speaker and headphone test.
Terms about webcam testing
- Resolution
- The pixel count of the picture, width by height. What shows here is the figure actually obtained, which may differ from the camera’s maximum.
- Aspect ratio
- The ratio of the picture’s width to its height. 16:9 and 4:3 are the common ones; where it differs from what the conferencing software expects, the edges may be cropped.
- Snapshot
- A still cut from the live preview at that instant. It serves for comparing lighting and background.
- Secure connection (HTTPS)
- Access to a camera or microphone is granted only over an encrypted connection, so that nobody can look in.
- Device in use
- The state in which one camera cannot be shared between applications at the same time. Quitting the conferencing software usually releases it.
- Field of view
- How wide a scene the camera takes in. The wider it is, the more background appears, and the more the background needs tidying.
Frequently Asked Questions
Side Note — How browsers get access to your camera
The technology that lets browsers work with camera feeds is called the getUserMedia API, standardized as part of WebRTC. Major browsers began implementing it around 2013, and it is now a standard feature that lets pages access a camera or microphone without any plugin. Video calls used to require Flash or a dedicated plugin, but this API made it possible to do everything directly in the browser.
To protect user privacy, browsers are designed to always require an explicit permission prompt before granting camera access. Even after you grant it once, per-site permissions can be reviewed or revoked at any time from the browser's settings. If a site you do not recognize asks for camera access, it is safer to check who is behind it before allowing it.
Even the same physical camera can yield a different resolution or frame rate depending on how it is connected — built-in, USB, or through virtual-camera software, for example. If a video call looks off, a test tool like this one lets you check the resolution actually being captured, and switching cameras or connection methods can often fix the issue.