Do these 3 things before closing this tab:
1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesFor a batch of web-page screenshots on a Raspberry Pi, run Chromium headless once per URL with --screenshot, set the viewport with --window-size, and save each run under a different filename. Chromium’s default output is screenshot.png in the current working directory, so a loop that does not move or isolate that file will overwrite earlier captures.
Capture one page first
- Find the Chromium command installed on your Pi. The command name varies by Linux installation. Chromium’s switch guidance uses
chromium-browseras an example, but do not assume that name is present on every Raspberry Pi OS setup. Check the executable available on your system and confirm its version. In Chrome,chrome://versiondisplays the complete effective command line; the Linux executable or package on a Pi may differ. See Chromium command-line switches. - Run a single capture. Replace
chromiumwith your installed command and the example URL with the page you want:chromium --headless --screenshot --window-size=1280,1696 https://example.com
This savesscreenshot.pngin the command’s current working directory. The viewport dimensions are examples; choose dimensions that suit the page and the output you need. Chromium documents these options in its headless Chrome guide. - Open the image and check it. Verify that the page loaded, the dimensions are suitable, and any content that appears after initial rendering is present before scaling up to a large list.
Batch URLs without overwriting screenshots
Put one URL per line in urls.txt, then run Chromium once for each line. Because every invocation writes the default screenshot.png to its current directory, move or rename that file after every capture, or give each invocation its own working directory.
mkdir -p captures
while IFS= read -r url; do
chromium --headless --screenshot --window-size=1280,1696 --timeout=5000 "$url"
# Move screenshot.png to a unique, sanitized filename here before the next iteration.
done < urls.txtThis is a shell pattern, not a tested Raspberry Pi script. The comment marks the essential missing step: replace it with a command that moves the output to a unique name before the next run. For example, a naming scheme can use a sanitized hostname plus a counter. Do not use an untrusted URL directly as a filename; URLs can contain characters that are invalid or inconvenient in file paths. Check that the command is the installed Chromium binary and that it accepts the switches shown.
For a simpler collision-proof arrangement, create a separate output directory for each URL and launch Chromium with that directory as its working directory. Keep a mapping between each URL and its resulting image so that captures remain identifiable.
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Control viewport and page readiness
Choose the viewport
--window-size=1280,1696 sets the browser viewport used for rendering. Adjust its width and height for the page layout you are trying to capture. A screenshot’s viewport is not a promise that every page element has loaded or that the resulting image represents the entire document; inspect sample output for the target pages.
Use a timeout carefully
--timeout=5000 sets a maximum wait of 5,000 milliseconds in Chromium’s documented example. It can give a page time to render, but it does not establish that a site’s delayed, animated, or asynchronous content is ready. Test representative pages, inspect the images, and increase or otherwise adjust the wait if required. Longer waits also make a batch take longer.
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Check Chromium’s headless mode on your installed build
Use --headless for the current headless approach described in Chromium’s documentation. The Chromium Headless README says that, as of M132, the old Headless shell functionality is no longer part of the Chrome binary, so --headless=old has no effect; users needing the old implementation are directed to chrome-headless-shell. Raspberry Pi packages can differ from or lag Chrome releases, so verify which binary and options your installed version supports rather than copying a command intended for another build. See the Chromium Headless README.
Web-page images or a screenshot of the Pi desktop?
| Approach | What it captures | Display/session | Batch use |
|---|---|---|---|
Chromium headless with --screenshot |
A rendered web page at the chosen browser viewport | Headless browser operation; no visible browser window is needed | Can be invoked repeatedly for a URL list, with distinct output paths to prevent overwriting |
| Scrot | The visible desktop screen | Captures the screen state in a desktop session | Useful when the target is the Pi’s displayed desktop rather than an individual rendered page |
Scrot is described as a Raspberry Pi desktop screenshot option by Raspberry Pi Official Magazine. It solves a different problem from Chromium’s page rendering.
Recommended Free Tools
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Troubleshoot common batch problems
- Every image is the same page or only the last capture remains: the default filename was reused in one directory. Move or rename
screenshot.pngafter each run, or use a separate working directory per URL. - “Command not found” or an unknown-switch error: confirm the executable name and version on the Pi, then check that build’s supported switches. Linux command names vary, and Chromium notes that switches can change or be removed.
- The image is missing late-loading content: the timeout may have elapsed before that content appeared. Try a representative URL with a longer wait and inspect the output; the timeout is a maximum wait, not a page-specific readiness guarantee.
- The image is the wrong size or layout: adjust the width and height in
--window-size, then capture again and check the resulting image. - You captured a web page but needed the desktop: Chromium headless renders a page, not the visible Pi screen. Use a desktop screenshot utility such as Scrot for that separate task.
Plan batch size, storage, and runtime from a sample
The available documentation does not establish a Raspberry Pi-specific capture speed, recommended batch size, memory requirement, or performance benchmark. Runtime will depend on the pages and the waits you configure, so capture a representative sample on the actual Pi before scheduling a large run. Check image dimensions, whether the content is ready, how much storage the files use, and whether the output naming scheme stays unique. A microSD card is simply one possible place to store local captures; no particular capacity or speed class is established here.
Or skip the browser setup
ScreenshotNeo offers a one-request alternative for URL-based captures. Its service accepts a URL and can return an image or PDF. For example, this cURL command requests a WebP screenshot:
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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 API documentation for setup and options. ScreenshotNeo removes cookie/consent banners, newsletter popups, and chat widgets before capture; bot checks, blank pages, and failed loads are not billed; and its MCP server lets AI agents take screenshots. The free plan includes 1,000 shots per month with no card, and paid plans start at $5 for 3,000 shots. Learn about ScreenshotNeo, then sign up for 1,000 free screenshots a month with no card.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Frequently Asked Questions
Can a Raspberry Pi batch capture use a different image name for every URL?
Yes. Move or rename the default screenshot.png after each run, or run captures in separate working directories.
Does Chromium’s screenshot timeout guarantee that all page content is ready?
No. It sets a maximum wait; delayed or asynchronous content may still need page-specific testing.
Quick Recap
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