Free Online Camera Test - Instantly Check Your Webcam and Mobile Camera Quality
Last reviewed: 2026-09-20
This free camera test checks your webcam or phone camera in the browser - no download, no account. Click Start Camera, allow the permission prompt, and a live preview appears with the negotiated resolution. It captures a single JPEG on your device; nothing is recorded as video or uploaded. Also called a webcam test or front-camera test.
It checks your camera only - front and rear lens, resolution - not the screen (use the LCD test) or the microphone (use the microphone test). See camera test vs webcam test to pick the right check first.
Troubleshooting a camera test "no signal" result
- Browser permission. Click the camera icon in the address bar and re-grant access. On Chrome, Site settings → Camera must be Allow; a blocked permission gives an instant black frame.
- Secure origin (HTTPS). Browsers expose the camera API only over
https://; plain HTTP returns no stream. - OS-level privacy. macOS: System Settings → Privacy & Security → Camera. Windows: Settings → Privacy & security → Camera. Linux: confirm user access to
/dev/video0. - Device in use elsewhere. A blank preview often means another app holds the camera - Zoom, Teams, OBS, or the native Camera app. Quit them and reload.
Apps, mobile quirks, and hardware switches that also block the picture
- Mobile sensor quirks. iOS Safari requires a user tap before the first sensor read. Android Chrome occasionally hides extra rear lenses from the browser, so a lens that returns nothing while the other previews fine means the browser could not open that facing mode.
- External webcam or stale driver. Unplug and reconnect a USB webcam, then update the camera driver; a restart clears a driver still attached to an app that has already closed.
- Physical shutter or BIOS toggle. A sliding privacy cover, or a BIOS camera disable switch on some laptops, gives a solid black frame rather than a permission error - the browser still reports the camera as active. See Camera test shows black screen: 4 fixes for the full diagnostic order.
Desktop vs mobile test differences
| Capability | Desktop browser | Mobile browser |
|---|---|---|
| Live preview | Yes | Yes |
| Resolution readout | Accurate, reflects the first matched MediaTrackConstraint | Accurate, but limited to the OS-reported mode |
| Switch front / rear camera | N/A | Yes, via the camera-select control |
| Permission prompts | Once per site per OS user | Once per tab unless saved |
Reading the controls and the resolution number
A resolution number lower than the camera's spec means another app already holds the high-resolution mode. On a phone the rear lens usually negotiates a higher resolution than the front selfie camera, so a lower number after switching lenses is expected rather than a fault.
Download saves the current still as a JPEG straight from this page, while Edit hands it to the full Photo Editor, pre-loaded with your photo, for crops and adjustments beyond a live-preview filter. See webcam mirror vs flip explained for the mirror-vs-flip breakdown and why most other apps store an un-mirrored file.
Related camera guides and device checks
For a full pre-call check, pair this camera test with the microphone test and the keyboard test.
- Camera test permission blocked: how to allow camera access
- How to check your webcam and microphone before an interview
- Device test checklist for remote work
- Test LCD: Pick the Right Screen-Test Tool
- Camera Check - what people mean and which tool to use
- Front Camera Test
← Back to Device Test Tools hub
Free Tool Online Editorial Team
Frequently Asked Questions
The tool shows "no camera detected" - what is the most common cause?
Browser permission is the usual culprit. Chrome, Edge, and Firefox need HTTPS and an explicit Allow, and an earlier Block will not re-prompt on its own. Click the camera icon in the address bar (or Site settings → Camera), set it to Allow, and reload the page.
Can I test my phone's front camera with this tool?
Yes. The tool opens the default camera, which on most phones is the front lens. If the rear camera opens instead, tap Switch Camera, or reload after granting permission so the camera-selection prompt reappears. iOS Safari, iOS Chrome, and Android browsers all behave the same way.
Camera test shows a black screen?
A solid black frame differs from a permission error. The guide Camera test shows black screen: 4 fixes covers the four causes in diagnostic order: a physical lens cover or BIOS toggle, a driver conflict, a browser codec restriction, and another app holding the camera exclusively.
How do I check my camera's resolution with this test?
When the preview starts, the tool shows the resolution your camera negotiated as width x height. That figure is the actual capture size, not the sensor's marketing megapixels, so a "2 MP" webcam can still report 1280 x 720. A smaller number than expected usually means another app holds the camera - close it and reload.
Does this camera test record video, or only take a photo?
It only takes a photo. There is no video-recording button - Capture grabs the single frame and saves it as a JPEG. Nothing is stored as video and nothing leaves the browser tab, so use it to confirm the lens and framing, not to record a clip.
Why don't the preview filters show up in my downloaded photo?
Filters are preview-only. They apply to the live video for visual feedback but are not baked into the captured file, so the downloaded JPEG reflects the raw camera output. To save an effect into the image, capture the plain photo here first, then apply the look in a photo editor.
Can I edit the photo I captured with this camera test?
Yes. After you capture a frame, Edit opens the on-site photo editor with that shot already loaded, so you can crop and adjust without downloading first. The hand-off stays on your device - the frame is not uploaded to any server.
Which browsers does the camera test work in?
It runs in current Chrome, Edge, Firefox, and Safari on desktop and mobile, because it uses the standard browser camera interface, not a plugin - nothing to install, no extension. An older browser without that interface shows a short message instead of a preview, so the browser, not the camera, is the limit.
Can I use it with a laptop's built-in webcam or an external USB webcam?
Yes. The test opens whatever camera your browser reports as the default, so a built-in laptop webcam or a plugged-in USB webcam both preview here. The Switch control targets phone lenses; on a desktop with several cameras, pick the default in your browser or system settings and reload.
Is the camera preview mirrored, and does the saved photo come out mirrored too?
By default the preview shows the raw camera image; the Flip control mirrors it left-to-right, which many find easier to frame against. Unlike the preview Filters, Flip carries through to Capture, so a photo taken with Flip on downloads mirrored. Turn Flip off before capturing if you want text to read the right way round.
Does this camera test also check my microphone or screen?
No - it tests the camera only. It opens the stream and reports the resolution but does not read the microphone or run any display check, so a clean preview confirms the lens and framing, nothing else. Use the microphone test for your mic and the LCD test for dead pixels or backlight, both linked below.
Should I test my camera before a video call, and will this show what a meeting app sees?
Yes. The live preview is the same feed the browser hands a video-call app, so a clear picture at the expected resolution means the camera is ready. Checking now catches a blocked permission or a lens held by another app before the meeting, not in front of everyone. Nothing is recorded or uploaded.
Where does the captured photo go after I press Download, and what is the file named?
Download saves the frame on screen to your device as a JPEG. The filename is captured- plus the date and time, for example captured-2026-09-14-1030.jpg, so a second photo never overwrites the first. It lands in your browser's usual downloads folder, with no extra save dialog beyond the browser's own prompt.
Does the camera test need an internet connection to run?
Only to load the page the first time. After that the lens, live preview, resolution readout, and capture all run in your browser offline, and nothing is sent to a server, so the test keeps working even if your network drops. You only need a connection again to reload or to follow the related links.
Why does my camera look blurry in the preview, and how do I fix the focus?
The preview shows exactly what the camera sends, so a blurry image comes from the camera, not this page - the test reports resolution but does not sharpen the feed. Usual causes: a smudged lens, a drifted focus ring, or autofocus hunting in low light. Wipe the lens, add light, and hold printed text at arm's length for autofocus to lock on; a fixed-focus webcam sharpens only at a set distance.
The browser says the camera is allowed but the preview is still blank - what else could be blocking it?
Most operating systems have a camera privacy switch above the browser, so the lens can stay dark even after you click Allow. On Windows: Settings → Privacy & security → Camera (turn on camera access and desktop-app access). On a Mac: System Settings → Privacy & Security → Camera, then enable your browser. On a phone, check the browser app's camera permission and reload.
Does the camera test show my camera's actual frame rate (fps)?
No. The page asks your browser for up to 60 frames per second as a preference, but only reads back and shows the negotiated resolution - the actual frame rate your camera delivers is never measured or displayed. For real fps, check your operating system's camera settings or a dedicated webcam utility instead.