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Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →To check a responsive website at 768 CSS pixels wide, use Chrome DevTools Device Mode, enter 768 in the viewport width field, and capture either the visible viewport or the full page. Then inspect the layout and nearby media-query breakpoints. A 768-pixel preset is a useful test width, not proof that every tablet behaves the same; use a real device as well when browser chrome, the on-screen keyboard, or device-specific form controls matter.
Set a 768 CSS-pixel viewport in Chrome
- Open the page in Chrome and open DevTools.
- Turn on Device Mode. It opens in responsive mode by default.
- Enter 768 in the viewport width control. Chrome also offers a 768-pixel Tablet preset; entering the number directly is helpful when you want to test that exact width.
- Set a viewport height that includes the content you need to examine. Width alone does not specify the screenshot’s height, so record the height if you will compare captures later.
- Inspect the page, then use More options > Show media queries to view breakpoint bars and examine the rules around the active width.
Chrome’s documented device-width presets are 320, 375, 425, 768, 1024, 1440, and 2560 pixels. These are convenient controls, not a set of universal device dimensions.
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Capture the viewport or the entire page
With Device Mode enabled and the width set to 768, open More options > Capture screenshot for the visible viewport. Choose Capture a full size screenshot when you need the page’s below-the-fold content too. These captures answer different questions: the first shows what fits in the current viewport; the second includes the full scrollable page.
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What to inspect at 768 pixels
Check the rendered result rather than assuming that a particular breakpoint or layout must apply at this width. Look for:
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- Text wrapping, clipped headings, or content that forces horizontal scrolling.
- Images and other media that overflow or leave unintended gaps.
- Controls that become crowded, too small to use comfortably, or misaligned.
- Changes at nearby media-query boundaries. The relevant breakpoints depend on the website’s design; inspect the rules shown in DevTools rather than treating 768 as a universal breakpoint.
Automate repeatable screenshots with Playwright
For a repeatable check or visual-regression workflow, set the page viewport to 768 pixels wide and use Playwright’s screenshot API. Choose a height that fits the test, and choose screenshot scale deliberately: CSS scale produces CSS-pixel output, while device scale reflects the device pixel ratio and produces a higher-resolution image when that ratio is above one.
Playwright’s official documentation covers viewport and device emulation and screenshots, including full-page capture and scale. The example below captures the full page at a 768-by-1024 CSS-pixel viewport; install Playwright and its browser before running it.
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import { chromium } from 'playwright';
const browser = await chromium.launch();
const page = await browser.newPage({
viewport: { width: 768, height: 1024 },
deviceScaleFactor: 1,
});
await page.goto('https://example.com', { waitUntil: 'networkidle' });
await page.screenshot({ path: 'tablet-768.png', fullPage: true, scale: 'css' });
await browser.close();Replace https://example.com with the page under test. Use fullPage: false for a viewport-only capture. To produce an image reflecting a device pixel ratio above one, configure deviceScaleFactor accordingly and use scale: 'device'. For pages that never become network-idle, choose a more appropriate readiness condition for that site rather than relying on a screenshot taken before its content is ready.
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Chrome emulation is useful for checking responsive layout, but it does not reproduce every behavior of a physical device. For Safari-specific review, Safari Responsive Design Mode can preview width, height, and pixel ratio. If correctness depends on address-bar behavior, the software keyboard, or device-specific form controls, verify on the relevant actual device and browser as well. Apple’s guidance discusses Safari Responsive Design Mode; web.dev’s responsive design guide also explains checking layouts and breakpoints in Chrome DevTools.
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Or skip the browser setup
ScreenshotNeo can return a screenshot or PDF through one GET request. It accepts cookie or consent banners like a visitor and removes more than 60 known consent platforms, newsletter popups, and chat widgets before capture; each cleanup step can be turned off. Bot checks and CAPTCHAs, blank pages, timeouts, failed loads, and cache hits cost nothing, and the response reports the page verdict and billing status in headers. Its MCP server provides screenshot tools for AI agents and other MCP clients. The free plan includes 1,000 screenshots a month with no card; paid plans start at $5 for 3,000 screenshots.
To request a capture at 768 CSS pixels wide, use the documented viewport parameter with your API key. See the ScreenshotNeo API documentation for the current parameter names and options.
curl -G "https://api.screenshotneo.com/v1/shot"
-d access_key=YOUR_API_KEY
--data-urlencode url=https://stripe.com
-d viewport_width=768
-o shot.webpReplace the example URL with the page you need to inspect. The ScreenshotNeo website describes the screenshot API and MCP server. Sign up for 1,000 free screenshots a month, with no card required.
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Common problems and fixes
- The page does not look like a tablet layout: 768 pixels is a viewport width, not a guarantee that a site switches to a tablet-specific layout there. Inspect the site’s media-query boundaries and active rules in DevTools.
- The screenshot cuts off content: A normal screenshot captures the visible viewport. Use Chrome’s full-size screenshot option or Playwright’s
fullPage: truewhen you need scrollable content. - Two screenshots have different dimensions: Confirm both viewport width and height, and keep the chosen screenshot scale consistent. CSS scale and device scale can produce different output pixel dimensions.
- The screenshot misses content that appears later: Wait for the page’s relevant content to load before capturing. A network-idle wait may not suit every site; choose a readiness condition that matches how the page loads.
- The emulated result differs from a phone or tablet: Emulation is a layout check, not a complete reproduction of device behavior. Test on the relevant device and browser when browser chrome, keyboard, or form behavior affects the result.
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