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Use Playwright’s page.screenshot({ path: 'thumbnail.png' }) after navigating to the page. The .png extension selects PNG output, and PNG is the documented default. For a thumbnail, set a viewport to match where the image will appear, then save the screenshot to a deliberate path.
Capture a website thumbnail as a PNG
Install Playwright and its browser binaries, then run this Node.js example. The 1200 × 630 viewport is an illustrative thumbnail size, not a Playwright requirement; set it to the dimensions or aspect ratio your publishing surface needs.
-
In your project directory, install Playwright:
npm install playwright. -
Install a browser for Playwright:
npx playwright install chromium.Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy. -
Save the following as
capture.js, replacing the example URL with the page you want to capture. -
Run
node capture.js. The script writesthumbnail.pngin the current working directory.
const { chromium } = require('playwright');
(async () => {
const browser = await chromium.launch();
try {
const page = await browser.newPage({
viewport: { width: 1200, height: 630 },
});
await page.goto('https://example.com');
await page.screenshot({ path: 'thumbnail.png' });
} finally {
await browser.close();
}
})();The example closes the browser in a finally block so it is also closed if navigation or capture fails. Playwright documents this launch, page, navigation, screenshot, and close pattern in its Page API.
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Choose viewport or full-page capture
By default, page.screenshot() captures the visible viewport. That is usually the right starting point for a compact thumbnail: the viewport controls the composition and prevents the image from becoming as tall as the entire document.
Use fullPage: true only when the thumbnail is meant to show the full scrollable page. A full-page capture can be much taller than a typical thumbnail and may not fit the destination’s aspect ratio without cropping or resizing.
await page.screenshot({
path: 'full-page.png',
fullPage: true,
});Playwright also supports clip for capturing a rectangle and locator screenshot methods for capturing a particular element. See the Screenshots guide for the relevant examples.
Set the output dimensions and pixel scale
The viewport is measured in CSS pixels; the screenshot’s pixel dimensions also depend on scale. Playwright’s screenshot scale defaults to 'device', which uses device pixels and can produce larger output on a high-DPI device. Set scale: 'css' to produce one output pixel per CSS pixel.
await page.screenshot({
path: 'thumbnail.png',
scale: 'css',
});The browser context’s deviceScaleFactor defaults to 1. If exact output dimensions matter, choose the viewport and device scale deliberately and use a consistent configuration for each capture. For example, a 1200 × 630 CSS-pixel viewport with CSS scale yields a 1200 × 630-pixel image. With device scale, the result depends on the context’s device scale factor.
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Pages can contain animations, blinking carets, rotating banners, or changing content. Playwright offers screenshot options to disable animations, hide the caret, mask selected locators, and apply a stylesheet during capture. Use these when they address a specific source of unwanted variation; disabling animation changes its behavior during capture, while masks visibly cover matching element bounds. The available options are documented in the Page API.
For visual comparisons, consistency also depends on the rendering environment. Playwright’s visual comparisons guide notes that host operating system, browser version, settings, hardware, power source, and headless mode can affect rendering. Keep the environment consistent with the one used to create the baseline.
Use screenshot assertions only for test workflows
page.screenshot() is the direct API for creating a thumbnail image file. Playwright Test’s toHaveScreenshot() is for screenshot assertions: it waits for two consecutive screenshots to match before comparing against an expected snapshot, and it requires the Playwright test runner. See the PageAssertions API if the goal is testing rather than saving a standalone thumbnail.
Common problems and fixes
-
No file appears: Check that you passed a
path. Without one,page.screenshot()returns an image buffer instead of writing a file.Recommended: PC Feels Slow? A Free Scan Shows What's Dragging Windows Down →Recommended: Crashes or Glitches? A Free Driver Scan Usually Finds the Culprit →Recommended: Fix Windows Errors and Clear Junk Files in Minutes - Free Scan →Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy. -
The file is in the wrong directory: A relative path is resolved from the process’s current working directory. Use an absolute path or set the working directory deliberately.
-
The image is unexpectedly tall: Remove
fullPage: trueto capture only the viewport. -
The image has more pixels than expected: The default scale is
'device'. Tryscale: 'css'and set the context’s device scale factor deliberately; the factor defaults to 1. -
PNG quality does not change: The screenshot API’s
qualitysetting does not apply to PNG. It applies to JPEG and WebP behavior. For PNG, adjust dimensions or use another format if a lossy quality setting is required.Do these 3 things before closing this tab:
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The image varies between runs: Control dynamic page elements where appropriate and keep the browser and rendering environment consistent, particularly when generating visual baselines.
Or skip the browser setup
If you do not want to install or manage a browser, ScreenshotNeo returns a screenshot with one GET request. This example saves the response as WebP; change the requested output format if you need PNG.
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://example.com -o shot.webpSee the ScreenshotNeo documentation for API details. It removes known cookie-consent banners, newsletter popups, and chat widgets before capture; bot checks, blank pages, failed loads, timeouts, and cache hits are not billed. Its MCP server lets AI agents use screenshot tools, and the free plan includes 1,000 shots per month without a card; paid plans start at $5 for 3,000 shots.
Sign up for ScreenshotNeo’s free plan to try it with 1,000 screenshots a month and no card.
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