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How to Capture a Full-Page Screenshot in Chrome at a Custom Viewport Size

Set a custom viewport in Chrome DevTools and capture the entire webpage, including content beyond the visible screen.
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To capture a full webpage at a chosen viewport size in Chrome, open DevTools, enable the device toolbar, set the dimensions in Responsive mode, then choose More options → Capture a full size screenshot. The regular “Capture screenshot” command saves only the visible viewport.

Capture the whole page at a custom viewport size

  1. Open the webpage in Chrome and open DevTools.

  2. Select Toggle device toolbar in DevTools.

  3. In the device toolbar’s Dimensions control, select Responsive. Enter the width and height you want, or drag the viewport handles to resize it. Chrome applies these dimensions to the emulated viewport.

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  4. Open the device toolbar’s More options menu.

  5. Select Capture a full size screenshot. Chrome captures the page, including content outside the visible viewport.

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Use Capture screenshot instead only when you want an image of the currently visible viewport. Both commands are in the same menu. See Chrome’s Device Mode documentation for the documented controls.

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Save dimensions for repeated captures

If you regularly use the same viewport and device settings, add a custom device in Device Mode. Open the device list, choose Edit, and add a device with a name, width, and height. You can also set its device pixel ratio, user-agent string, and device type. These extra fields are optional; use them when you need those settings to be part of the reusable configuration.

Understand what the screenshot represents

Device Mode is a first-order approximation of a mobile experience. The page runs on your desktop or laptop, not on a physical mobile device. A screenshot taken this way is useful for checking a chosen responsive viewport, but it does not prove that the page renders or performs identically on real mobile hardware.

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Or skip the browser setup

ScreenshotNeo is a website screenshot API and MCP server for developers. Send a GET request with a URL to get a PNG, JPEG, WebP, or PDF. The example below saves a WebP screenshot; the API uses the default viewport unless you add the relevant options. See the ScreenshotNeo documentation for API parameters.

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curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webp

ScreenshotNeo accepts cookie and consent banners as a visitor and removes more than 60 known consent platforms, newsletter popups, and chat widgets before capture; you can turn each step off. Bot checks, blank pages, timeouts, failed loads, and cache hits are not billed, and response headers identify the page verdict and billing status. Its MCP server provides take_screenshot, get_page_info, and capture_pdf for Claude, Cursor, and other MCP clients. The free plan includes 1,000 shots per month without a card; paid plans start at $5 for 3,000.

Sign up for ScreenshotNeo’s free plan to try it without a card.

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Frequently Asked Questions

Does “Capture a full size screenshot” include content below the fold?

Yes. It captures the whole page, including content that is outside the visible viewport.

Can I use a saved custom device instead of entering dimensions each time?

Yes. Add one through Device Mode’s device list and Edit, then enter its name, width, and height. Device pixel ratio, user-agent string, and device type are optional.

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