For a quick one-off capture, set Chrome’s viewport and pass --force-device-scale-factor=N. For repeatable automation with an explicitly controlled device pixel ratio (DPR), use the Chrome DevTools Protocol (CDP): call Emulation.setDeviceMetricsOverride with the viewport dimensions and deviceScaleFactor, then capture with Page.captureScreenshot.
Choose the capture method
| Method | Best for | DPR control |
|---|---|---|
| Chrome command line | A quick, one-off screenshot | Uses --force-device-scale-factor=N; convenient, but less explicit than a CDP metric override. |
| Chrome DevTools Protocol | Scripted, repeatable browser automation | Sets deviceScaleFactor directly alongside emulated device dimensions. |
Set the CSS viewport dimensions and DPR separately. A 1280-by-800 viewport at DPR 2 is not the same configuration as a 2560-by-1600 CSS viewport.
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Take a quick screenshot from the command line
With Chrome installed and its executable available as chrome in your shell, run:
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--window-size=1280,800
--force-device-scale-factor=2
--screenshot=shot.png
https://example.comChange --window-size to the requested browser window dimensions and --force-device-scale-factor to the desired DPR. Chrome’s Headless command-line reference documents --screenshot and --window-size; the --force-device-scale-factor switch is described in Chromium issue documentation, including its effect on screenshots and window.devicePixelRatio.
#1 Best Overall
- Compatible with Nintendo Switch 2’s new GameChat mode
- Auto-Light Balance: RightLight boosts brightness by up to 50%, reducing shadows so you look your best—compared to previous-generation Logitech webcams (1)
- Privacy with a Slide: The integrated webcam cover makes it easy to get total, reliable privacy when you're not on a video call
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- Easy Plug-And-Play: The Brio 101 works with most video calling platforms, including Microsoft Teams, Zoom and Google Meet—no hassle; it just works
Chrome’s CLI reference says --screenshot saves screenshot.png in the current working directory by default. This example supplies shot.png explicitly. The documented --window-size=412,892 example illustrates the dimensions syntax. See Chrome Headless command-line reference and Chromium issue documentation for the scale-factor switch.
Wait for a page that is still loading
You can add --timeout=5000 to capture after waiting up to five seconds:
chrome --headless
--window-size=1280,800
--force-device-scale-factor=2
--timeout=5000
--screenshot=shot.png
https://example.comThis is a maximum wait, not proof that every image or asynchronous component has finished. For pages that render content dynamically, use an automation-level readiness condition rather than assuming a fixed delay is sufficient.
Rank #2
- Compatible with Nintendo Switch 2’s new GameChat mode
- Crisp HD 720p/30 fps video calls with diagonal 55° field of view and auto light correction. Compatible with popular platforms including Skype and Zoom.
- The built-in noise-reducing mic makes sure your voice comes across clearly up to 1.5 meters away, even if you’re in busy surroundings.
- C270’s RightLight 2 feature adjusts to lighting conditions, producing brighter, contrasted images to help you look good in all your conference calls.
- The adjustable universal clip lets you attach the camera securely to your screen or laptop, or fold the clip and set the webcam on a shelf. You’re always ready for your next video call.
Set DPR explicitly with CDP
For a script that needs direct control over emulated device metrics, send Emulation.setDeviceMetricsOverride, then request a PNG with Page.captureScreenshot. The example below shows the protocol calls; client must be an established CDP client connected to the target page.
await client.send('Emulation.setDeviceMetricsOverride', {
width: 1280,
height: 800,
deviceScaleFactor: 2,
mobile: false,
});
const { data } = await client.send('Page.captureScreenshot', {
format: 'png',
});
// Decode the returned base64 data and save the bytes as a PNG.
const png = Buffer.from(data, 'base64');
await writeFile('shot.png', png);The CDP protocol definition describes deviceScaleFactor as the override for device scale factor; a value of 0 disables the override. The command also overrides device dimensions and values relevant to window dimensions and device-width/device-height CSS media queries. Consult the CDP Emulation.setDeviceMetricsOverride definition and Page.captureScreenshot definition.
Use the same calls from Puppeteer
In Puppeteer, create a CDP session for the page’s target and send the same protocol commands through that session. The exact session setup depends on the Puppeteer version in use; keep the metric override and screenshot calls above as the protocol-level steps, and follow the matching version’s Puppeteer API for connecting the session.
Rank #3
- 【Full HD 1080P Webcam】Powered by a 1080p FHD two-MP CMOS, the NexiGo N60 Webcam produces exceptionally sharp and clear videos at resolutions up to 1920 x 1080 with 30fps. The 3.6mm glass lens provides a crisp image at fixed distances and is optimized between 19.6 inches to 13 feet, making it ideal for almost any indoor use.
- 【Wide Compatibility】Works with USB 2.0/3.0, no additional drivers required. Ready to use in approximately one minute or less on any compatible device. Compatible with Mac OS X 10.7 and higher / Windows 7, 8, 10 & 11 / Android 4.0 or higher / Linux 2.6.24 / Chrome OS 29.0.1547 / Ubuntu Version 10.04 or above. Not compatible with XBOX/PS4/PS5.
- 【Built-in Noise-Cancelling Microphone】The built-in noise-canceling microphone reduces ambient noise to enhance the sound quality of your video. Great for Zoom / Facetime / Video Calling / OBS / Twitch / Facebook / YouTube / Conferencing / Gaming / Streaming / Recording / Online School.
- 【USB Webcam with Privacy Protection Cover】The privacy cover blocks the lens when the webcam is not in use. It's perfect to help provide security and peace of mind to anyone, from individuals to large companies. 【Note:】Please contact our support for firmware update if you have noticed any audio delays.
- 【Wide Compatibility】Works with USB 2.0/3.0, no additional drivers required. Ready to use in approximately one minute or less on any compatible device. Compatible with Mac OS X 10.7 and higher / Windows 7, 10 & 11, Pro / Android 4.0 or higher / Linux 2.6.24 / Chrome OS 29.0.1547 / Ubuntu Version 10.04 or above. Not compatible with XBOX/PS4/PS5.
Verify the DPR and output dimensions
Do not infer the image’s pixel dimensions solely from the requested viewport. Capture mode, page content, and Chrome version can affect screenshot bounds. Check both the actual PNG dimensions and the page’s reported DPR in the environment you run.
- Inspect the PNG’s width and height with an image viewer or image-processing utility.
- Evaluate
window.devicePixelRatioon the captured page to confirm the browser’s effective DPR. - If either value differs from expectations, check whether the capture is viewport-sized or full-page and confirm which Chrome executable and version ran.
Viewport screenshots and full-page screenshots are different
A normal screenshot captures the visible viewport; it does not automatically include the entire document. If you need a full-page image, select and verify a full-page capture method separately. Treat the viewport dimensions and DPR as device emulation settings, and full-page behavior as a separate capture choice.
When to use virtual screen configuration
--screen-info configures the virtual display and its properties. That is broader than ordinary DPR emulation with --force-device-scale-factor or CDP’s deviceScaleFactor. Chrome documents --screen-info as available in stable Chrome starting with version 142; use it when you need virtual-display configuration, not merely a specific emulated DPR.
Rank #4
- 1080P Webcam with Cover for Video Calls - EMEET computer webcam provides design and Optimization for professional video streaming. Realistic 1920 x 1080p video, 5-layer anti-glare lens, providing smooth video. C960 computer camera delivers 1920x1080 video with fixed focus (11.8–118.1 inches), so as to provide a clearer image. C960 USB webcam has a cover and can be removed automatically to meet your needs for privacy. For optimal image performance, use the webcam in a well-lit environment.
- Built-in 2 Omnidirectional Mics - EMEET webcam with microphone for desktop features 2 built-in omnidirectional microphones, picking up your voice to create clear audio for communication. When installing the webcam, select EMEET C960 as the default microphone input device in your computer and video applications and select C960 as the default device in Zoom/Teams and ensure microphone permissions are enabled for proper use. Please note that C960 does not include built-in speakers.
- Automatic Light Adjustment - Automatic exposure adjustment is applied in EMEET HD webcam 1080p so that the streaming webcam can deliver stable image performance. EMEET C960 camera for computer also features color adjustment and exposure optimization to help you look your best. For optimal video quality, it is recommended to use the webcam in normal or well-lit environments and select suitable video settings in your application. Proper lighting helps achieve a clearer and more balanced image.
- Plug-and-Play & Upgraded USB Connectivity - New C960 webcam features both USB Type-A & A-to-C adapter connections for wider compatibility. For stable performance, connect the webcam directly to the computer's main USB port and ensure the device is recognized correctly. If a hub or docking station is used, please ensure it provides sufficient power and stable data transmission, as limited ports may affect performance. 90° wide-angle lens captures more participants without frequent adjustments.
- High Compatibility & Multi Application - C960 webcam for laptop is compatible with Windows 10/11, macOS 10.14+, and Android TV 7.0+. Not supported: Windows Hello, TVs, tablets, or game consoles. It works with Zoom, Teams, Facetime, Google Meet, YouTube and more. Please select C960 webcam as the default camera and microphone device in your application and ensure camera/microphone permissions are enabled, especially on macOS. (Tips: Incompatible with Windows Hello)
Troubleshooting
The screenshot has the wrong pixel dimensions
First check the captured PNG’s actual bounds and whether you requested a viewport or full-page capture. Then verify that the requested viewport and DPR reached the running Chrome instance. A viewport size is not itself a DPR setting.
window.devicePixelRatio does not match the target
For the CLI, confirm that --force-device-scale-factor=N is present on the Chrome launch command. For CDP, confirm that Emulation.setDeviceMetricsOverride was sent to the page’s active target with the intended deviceScaleFactor; the protocol’s value 0 disables the override.
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Images or dynamic content are missing
A fixed --timeout only waits up to the specified duration; it does not guarantee that page resources or asynchronous rendering are complete. In automation, wait for a page-specific readiness condition before calling the screenshot method.
Best Value
- Compatible with Nintendo Switch 2’s new GameChat mode
- HD lighting adjustment and autofocus: The Logitech webcam automatically fine-tunes the lighting, producing bright, razor-sharp images even in low-light settings. This makes it a great webcam for streaming and an ideal web camera for laptop use
- Advanced capture software: Easily create and share video content with this Logitech camera that is suitable for use as a desktop computer camera or a monitor webcam
- Stereo audio with dual mics: Capture natural sound during calls and recorded videos with this 1080p webcam, great as a video conference camera or a computer webcam
- Full HD 1080p video calling and recording at 30 fps. You'll make a strong impression with this PC webcam that features crisp, clearly detailed, and vibrantly colored video
The CLI says Chrome cannot be found
The sample assumes the executable is named chrome and available on PATH. Use the installed Chrome executable’s path or adjust the command for the binary name on your system.
Or skip the browser setup
ScreenshotNeo is a website screenshot API and MCP server. One GET request can return a PNG, JPEG, WebP, or PDF; it accepts the parameter names other screenshot APIs use. Its API supports retina scale, viewport sizes, device presets, and full-page capture with lazy images loaded. For an API call, set scale to the retina scale you need; see the ScreenshotNeo API documentation for the available parameters.
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://example.com -o shot.webpScreenshotNeo accepts cookie or consent banners as a visitor and removes more than 60 known consent platforms, newsletter popups, and chat widgets before capture; each step can be turned off. Bot checks or CAPTCHAs, blank pages, timeouts, failed loads, and cache hits are not billed, and response headers report the page verdict and billing status. Its MCP server provides take_screenshot, get_page_info, and capture_pdf tools for AI agents. The Free plan includes 1,000 screenshots per month with no card; paid plans start at $5 for 3,000 shots.
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Frequently Asked Questions
Does Chrome Headless support taking screenshots?
Yes. Chrome’s Headless command-line interface supports --screenshot; use the CLI example above for a one-off image.
What does a device scale factor of 0 mean in CDP?
In Emulation.setDeviceMetricsOverride, deviceScaleFactor: 0 disables the override.
Quick Recap
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