Use PNG when you need transparency, want Puppeteer’s default format, or prefer to avoid JPEG’s lossy quality setting. Use JPEG when you want lossy compression and need to set a quality value. Puppeteer documents JPEG quality from 0 to 100; the setting does not apply to PNG. The current Puppeteer API type also lists WebP, but verify support in the version installed in your project.
PNG vs. JPEG in Puppeteer
| Need | Choose | What Puppeteer documents |
|---|---|---|
| Transparent screenshot | PNG | omitBackground: true hides the default background and allows transparency; PNG is the default format. |
| Adjustable compression quality | JPEG | The quality option accepts a value from 0 to 100 and does not apply to PNG. Chromium’s protocol describes screenshot compression quality as JPEG-only. |
| Keep Puppeteer’s default | PNG | ScreenshotOptions.type defaults to 'png'. |
| Use WebP | Check your installed Puppeteer version | The current API type definition includes 'webp', but format availability can vary by version. |
The official API references describe behavior, not a controlled comparison of PNG and JPEG file sizes or visual fidelity. There is no universally prescribed JPEG quality value; test your pages and settings if those trade-offs matter.
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Save a screenshot in the format you want
Puppeteer infers the screenshot format from the filename extension when you provide a path. You can also set type explicitly. Keep the extension and type consistent so the output is clear to you and to tools that inspect the file.
// Default PNG output
await page.screenshot({ path: 'page.png' });
// JPEG with an explicit quality setting
await page.screenshot({
path: 'page.jpg',
type: 'jpeg',
quality: 80,
});
// Transparent PNG, when the page has a transparent background
await page.screenshot({
path: 'logo.png',
type: 'png',
omitBackground: true,
});
For example, a JPEG output can be saved with path: 'page.jpg' and type: 'jpeg'. Setting both makes the intended format explicit. Puppeteer documents the extension-based inference behavior in its ScreenshotOptions reference.
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Make a transparent screenshot
- Choose PNG, the format Puppeteer uses by default.
- Set
omitBackground: trueto hide the browser’s default background. - Make sure the page content itself does not paint an opaque background over the area you want to be transparent.
omitBackground does not remove backgrounds defined by the page’s own content or styles. Puppeteer’s ScreenshotOptions reference documents the option and its transparency behavior.
Other screenshot options that affect the capture
These options change which part of the page is captured, rather than choosing between PNG and JPEG:
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fullPagecaptures the full page.clipcaptures a selected region.omitBackgroundcontrols the default background behavior.
Puppeteer’s Screenshots guide also demonstrates capturing an individual element.
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- Cookie and consent banners, newsletter popups, and chat widgets are removed before capture; each cleanup step can be turned off.
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Troubleshooting format problems
- The saved format is not what you expected: Check the filename extension and the explicit
type. Puppeteer can infer the format from the extension when a path is supplied. - Your PNG has no transparency: Set
omitBackground: trueand check whether the page itself paints an opaque background. - A quality setting has no effect on PNG: Puppeteer documents
qualityas inapplicable to PNG. Use JPEG if you need that quality control. - WebP is rejected or unavailable: Check the API reference and type definitions for the Puppeteer version installed in your project; the current type definition is not a guarantee for older versions.
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