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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Set deviceScaleFactor: 2 on the browser context and use scale: 'device' in page.screenshot(). Together, these settings make each CSS pixel map to two output pixels in each dimension. For example, a 1280 × 800 CSS-pixel viewport yields a 2560 × 1600 image.
Capture a viewport screenshot at 2×
Configure the device scale factor when you create the browser context, then explicitly choose device-pixel output in the screenshot call:
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const context = await browser.newContext({
viewport: { width: 1280, height: 800 },
deviceScaleFactor: 2,
});
const page = await context.newPage();
await page.goto('https://example.com');
await page.screenshot({ path: 'page-2x.png', scale: 'device' });This example assumes browser is an already launched Playwright browser. The 2560 × 1600 dimensions follow arithmetically from the configured viewport and device-pixel ratio; they are not a separate benchmark.
Why both settings matter
deviceScaleFactor belongs to the browser context and defaults to 1. Setting it to 2 requests a 2:1 device-pixel ratio. The screenshot option scale controls how CSS pixels become output pixels: 'css' produces one output pixel per CSS pixel, while 'device' produces one output pixel per device pixel. Playwright documents 'device' as the screenshot scale default.
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For a deliberate 2× result, specify both. If you set only scale: 'device' while the context DPR remains 1, the output can still be 1×. Setting only deviceScaleFactor: 2 does not explicitly select the screenshot output scale.
Capture the full scrollable page at 2×
Add fullPage: true to capture content beyond the current viewport:
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await page.screenshot({
path: 'full-page-2x.png',
fullPage: true,
scale: 'device',
});The full-page option expands the captured page height; it does not change pixel density. With the context still configured with deviceScaleFactor: 2, the full-page image uses 2× output pixels in both dimensions. Its height depends on the page’s scrollable content.
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Capture just one element
When you need a component rather than the viewport or whole page, take a locator screenshot. The same context scale setting applies:
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await page.locator('.report-card').screenshot({
path: 'report-card-2x.png',
scale: 'device',
});Replace .report-card with a selector for the element you want. Locator screenshots are documented in Playwright’s screenshot guide.
Check the output and keep visual comparisons consistent
- For a viewport capture, multiply each CSS viewport dimension by two to estimate the output dimensions. For a full-page image, the width follows the viewport while the height depends on the scrollable page.
- If the image is smaller than expected, check that the context uses
deviceScaleFactor: 2and that the capture usesscale: 'device', not'css'. - A 2× image has more output pixels than a 1× image, but the documentation does not establish a fixed file-size multiplier. File size also depends on image content and format.
- Higher resolution does not make visual regression tests deterministic. Playwright notes that rendering can vary with the operating system, browser version, settings, hardware, power source and headless mode. Keep the runtime environment consistent with the baseline when comparing screenshots.
Troubleshooting
The screenshot is still 1×
Confirm that deviceScaleFactor: 2 is set on the same browser context that created the page. Also specify scale: 'device' in the screenshot options. A context left at its default DPR of 1 will not produce 2× output merely because device scaling is selected.
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The screenshot has the right width but misses lower-page content
A normal page screenshot captures the current viewport. Add fullPage: true when you need the full scrollable page; this changes the captured extent, not the pixel ratio.
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Check whether the operating system, browser version, headless mode, settings or hardware differ from the baseline environment. A high-DPI capture controls output resolution, not all sources of rendering variation.
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Or skip the browser setup
ScreenshotNeo can return a screenshot or PDF from one GET request. Its clean-shot steps accept cookie and consent banners and remove 60+ known consent platforms, newsletter popups and chat widgets; each step can be turned off. Bot checks, blank pages, timeouts, failed loads and cache hits cost nothing, and response headers identify the page verdict and billing status. ScreenshotNeo also offers an MCP server for AI agents, with tools including take_screenshot, get_page_info and capture_pdf.
Its API supports viewport and device options, but the example below requests a screenshot of a URL; it does not specify a 2× scale. See the ScreenshotNeo documentation for API parameters.
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpThe Free plan includes 1,000 screenshots per month with no card. Paid plans start at $5 for 3,000 screenshots. Sign up for ScreenshotNeo’s free plan.
Sources
- Playwright Page API: screenshot options
- Playwright Browser API: new context options
- Playwright screenshot guide
- Playwright visual comparisons and snapshots
Playwright documentation can change over time; check the references for the version you use when version-specific behavior matters.
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