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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchUse Puppeteer when your replacement must navigate, authenticate, wait for application state, or set PDF options per page. Use Chrome headless when a shell command is enough. Puppeteer’s page.pdf() is the closest programmable replacement for a PhantomJS readPdf() wrapper, but Chromium uses different rendering and print defaults, so you must map paper settings and validate timing, fonts, headers, and CSS.
Choose the replacement: Puppeteer or Chrome headless
Puppeteer is a JavaScript library that automates Chrome and Firefox and exposes navigation, cookies, DOM interaction, waiting, and PDF generation. It is the better fit for authenticated pages, dashboards, invoices, reports, and any workflow that must click or modify the DOM before printing.
Chrome’s command line is simpler for a public URL and a fixed output file:
chrome --headless --print-to-pdf=output.pdf https://example.com
chrome --headless --print-to-pdf=output.pdf --no-pdf-header-footer https://example.comChrome also supports --timeout=5000 for a bounded wait and --virtual-time-budget=42000 when timers or animations need simulated time to advance. The exact executable name can differ by operating system; use the installed Chrome or Chromium binary in your environment.
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Install Puppeteer and generate the basic PDF
The package puppeteer downloads a compatible Chrome for Testing during installation when install scripts are permitted. Choose puppeteer-core when your deployment manages Chrome itself; it does not download a browser, so provide an executable path or channel.
npm install puppeteerThis complete example preserves browser cleanup even when navigation or printing fails:
import puppeteer from 'puppeteer';
const url = process.argv[2] || 'https://example.com';
let browser;
try {
browser = await puppeteer.launch();
const page = await browser.newPage();
await page.goto(url, { waitUntil: 'networkidle2' });
await page.pdf({
path: 'output.pdf',
format: 'A4',
printBackground: true,
preferCSSPageSize: true,
margin: { top: '12mm', right: '12mm', bottom: '12mm', left: '12mm' }
});
} finally {
if (browser) await browser.close();
}Run it with node make-pdf.js https://example.com. page.pdf() prints using the print CSS media type and waits for fonts by default. Keep that behavior unless you have a deliberate reason to change it.
Control print versus screen styles
PhantomJS jobs sometimes captured the screen appearance rather than print styles. Puppeteer’s PDF operation uses print media by default. To reproduce screen styling, set the media type before printing:
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await page.emulateMediaType('screen');
await page.pdf({ path: 'output.pdf', printBackground: true });Conversely, leave the default print media when your document has intentional @media print rules. Inspect the page’s @page declarations and decide whether CSS or the API should own the paper size.
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Map PhantomJS paperSize to Puppeteer
PhantomJS paperSize supports standard formats such as A3, A4, A5, Legal, Letter, and Tabloid; custom dimensions in millimetres, centimetres, inches, or pixels; margins; portrait or landscape orientation; and repeating header and footer content. Puppeteer exposes the corresponding controls as follows:
| PhantomJS concept | Puppeteer option | Migration note |
|---|---|---|
| Standard paper format | format: 'A4', 'Letter', etc. |
Use one named format instead of width and height. |
| Custom width and height | width, height |
Use units such as mm, cm, in, or px. |
| Margins | margin: {top, right, bottom, left} |
Specify units explicitly, for example '12mm'. |
| Orientation | landscape: true |
Omit or set false for portrait. |
| CSS page size | preferCSSPageSize: true |
Lets the document’s @page rule control dimensions. |
| Background graphics | printBackground: true |
Enable when the old PDF included colored or image backgrounds. |
| Repeating header/footer | displayHeaderFooter: true, headerTemplate, footerTemplate |
Chrome templates are separate from CLI header/footer suppression. |
For custom paper, use a single source of truth. For example:
await page.pdf({
path: 'custom.pdf',
width: '210mm',
height: '297mm',
margin: { top: '15mm', right: '10mm', bottom: '15mm', left: '10mm' },
landscape: false,
printBackground: true,
preferCSSPageSize: true
});If both an API format and CSS @page size are present, preferCSSPageSize: true gives CSS priority. Confirm the result rather than assuming Chromium and PhantomJS paginate identically.
Replace a callback-style readPdf wrapper safely
PhantomJS’s callback-oriented readPdf() wrapper is application code, not a standard Puppeteer API. Keep your existing input contract if callers depend on it, but convert completion to a promise and close the browser in finally.
import puppeteer from 'puppeteer';
export async function readPdfReplacement(options, callback) {
let browser;
try {
browser = await puppeteer.launch();
const page = await browser.newPage();
if (options.cookies) await page.setCookie(...options.cookies);
await page.goto(options.url, { waitUntil: 'networkidle2' });
if (options.media === 'screen') await page.emulateMediaType('screen');
await page.pdf({
path: options.path,
format: options.format || 'A4',
width: options.width,
height: options.height,
landscape: Boolean(options.landscape),
margin: options.margin,
printBackground: options.printBackground !== false,
preferCSSPageSize: options.preferCSSPageSize !== false,
displayHeaderFooter: Boolean(options.displayHeaderFooter),
headerTemplate: options.headerTemplate,
footerTemplate: options.footerTemplate
});
callback(null, options.path);
} catch (error) {
callback(error);
} finally {
if (browser) await browser.close();
}
}Recheck selectors, cookies, authentication, custom fonts, external images, and JavaScript timing. Chromium and PhantomJS are different browser engines, so a visually similar input can paginate differently.
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Wait for the page that users actually see
networkidle2 waits for a period with no more than two active network connections, but it is not proof that an application has finished rendering. Add an application-specific readiness signal when needed:
await page.goto(url, { waitUntil: 'domcontentloaded' });
await page.waitForSelector('[data-report-ready]', { timeout: 30000 });
await page.evaluate(() => document.fonts.ready);
await page.waitForFunction(() => [...document.images].every(img => img.complete));
await page.pdf({ path: 'report.pdf', format: 'A4', printBackground: true });Use a bounded timeout for every wait. For data loaded by a single request, wait for the relevant selector or response instead of adding an arbitrary long sleep. If an animation changes layout, disable it with CSS or wait until its final state before printing.
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Headers, footers, page ranges, and long documents
For Puppeteer headers and footers, enable displayHeaderFooter and supply HTML templates. Chrome exposes page-number classes such as pageNumber and totalPages inside those templates. The command-line switch --no-pdf-header-footer is a different control and does not configure Puppeteer templates.
For a long report, test page breaks, repeated table headings, images near boundaries, and custom fonts. Use CSS such as break-inside: avoid selectively; applying it to very large containers can create unexpectedly blank pages. Puppeteer also supports page ranges through its PDF options, which is useful for testing a subset before producing the entire document.
Validate the migration before switching production traffic
- Compare geometry: check paper size, orientation, margins, and whether CSS
@pagerules are taking effect. - Compare appearance: verify background colors, images, font weights, line wrapping, and print-versus-screen rules.
- Compare data timing: confirm web fonts, images, API data, and client-side charts are present before printing.
- Test chrome: exercise headers, footers, page numbers, custom dimensions, and page ranges separately.
- Test failure cleanup: terminate a navigation, font, or PDF error and confirm the browser process exits.
- Pin versions: record Puppeteer and Chrome versions, then periodically review them because rendering and API defaults can change.
Troubleshooting common migration failures
The PDF is blank or missing application data
Cause: printing started after navigation but before client-side rendering completed. Fix: wait for a page-specific ready selector, the required response, fonts, and images. Capture the same URL with JavaScript enabled and inspect console errors.
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Colors or backgrounds disappeared
Cause: print CSS suppresses them or backgrounds were not requested. Fix: set printBackground: true, inspect @media print, and use emulateMediaType('screen') only when screen styling is the intended output.
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Cause: conflicting API dimensions and @page CSS, or a unit conversion mistake. Fix: choose named format or explicit width/height, use units, and set preferCSSPageSize deliberately.
Headers or footers do not appear
Cause: displayHeaderFooter is false, or a CLI suppression flag was used. Fix: enable the Puppeteer option and provide templates; do not rely on the CLI flag for template behavior.
Fonts or images are missing
Cause: external resources failed, authentication blocked them, or printing happened too early. Fix: set cookies or headers before navigation, wait for document.fonts.ready and image completion, and verify resource URLs from the browser context.
Puppeteer cannot launch in CI or a container
Cause: the selected binary is absent, install scripts were disabled, or the runtime lacks required system dependencies. Fix: install Chrome explicitly, use puppeteer-core with its executable path when your platform manages the browser, and document the launch configuration. Do not assume a locally installed desktop Chrome exists in a restricted runner.
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Processes accumulate after errors
Cause: the code closes the browser only on success. Fix: put shutdown in finally and ensure each job owns and closes its browser or page.
Or skip the browser setup
ScreenshotNeo provides a URL-to-PDF and screenshot API when you do not want to install or operate a browser. It accepts 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 disabled. Bot checks or CAPTCHAs, blank pages, timeouts, failed loads, and cache hits are not billed, and each response reports the result in X-Page-Verdict and X-Billed headers. Its MCP server exposes take_screenshot, get_page_info, and capture_pdf to Claude, Cursor, and other MCP clients.
For the PDF-oriented call, request PDF output and pass the same target URL:
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.pdfSee the ScreenshotNeo documentation for PDF parameters such as paper size, margins, landscape mode, page ranges, and the other capture options.
Quick wins for a faster PC:
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import requests
r = requests.get(
"https://api.screenshotneo.com/v1/shot",
params={"access_key": "YOUR_API_KEY", "url": "https://stripe.com"},
timeout=90,
)
r.raise_for_status()
open("shot.pdf", "wb").write(r.content)Node.js
const q = new URLSearchParams({ access_key: 'YOUR_API_KEY', url: 'https://stripe.com' });
const res = await fetch(`https://api.screenshotneo.com/v1/shot?${q}`);
if (!res.ok) throw new Error(`HTTP ${res.status}`);
require('fs').writeFileSync('shot.pdf', Buffer.from(await res.arrayBuffer()));ScreenshotNeo includes full-page capture with lazy images loaded, CSS-selector element capture, dark mode, 12 device presets plus custom viewports, retina scale, custom CSS and JavaScript, clicks, selector or network-idle waits, ad and tracker blocking, custom headers and cookies, user agents and Authorization, timezone and geolocation, transparent backgrounds, resizing, chosen cache TTLs, signed links, asynchronous jobs with signed webhooks, bulk capture for up to 100 URLs per call, a usage API, an OpenAPI specification, and compatibility with parameter names used by other screenshot APIs. Every feature is on every plan: 1,000 screenshots per month are free with no card; paid plans start at $5 for 3,000. Create a free ScreenshotNeo account.
Frequently Asked Questions
Can I keep PhantomJS output byte-for-byte identical?
No. PhantomJS and Chromium use different rendering engines, fonts, layout behavior, and pagination. Treat the old PDF as a visual reference and approve defined differences during migration.
When should I use puppeteer-core instead of puppeteer?
Use puppeteer-core when your platform supplies and manages Chrome. It does not download a browser, so configure the executable path or channel and document that dependency.
Does Chrome headless support the same header and footer templates as Puppeteer?
The CLI and Puppeteer expose different controls. Validate CLI output separately; Puppeteer templates require displayHeaderFooter and template options.
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