To capture a website from a Node.js server with Puppeteer, launch a browser, open a page, navigate to the target URL, and call page.screenshot(). Choose the screenshot options based on whether you need the visible viewport, the full document, a cropped region, or one element. In a server handler, close the browser in a finally block so errors do not leave browser processes behind.
Minimal Puppeteer screenshot flow
The example below uses ECMAScript modules and saves a PNG to disk. Install Puppeteer in your Node project with npm install puppeteer; the package downloads a compatible browser by default. This uses the current Puppeteer documentation version, 25.12.0, as shown on the cited API pages.
import puppeteer from 'puppeteer';
const browser = await puppeteer.launch();
try {
const page = await browser.newPage();
await page.goto('https://example.com', { waitUntil: 'networkidle2' });
await page.screenshot({ path: 'capture.png', type: 'png' });
} finally {
await browser.close();
}The lifecycle—launch, create a page, navigate, capture, then close—is the pattern in Puppeteer’s Page API example. The screenshot guide demonstrates networkidle2 as a navigation condition, but it does not guarantee that every site’s application content is ready. See the screenshots guide.
For CommonJS projects, use const puppeteer = require('puppeteer'); and place the asynchronous work inside an async function. The ESM example is directly runnable in a project configured for modules.
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Return screenshot bytes from a Node API
Without a path, page.screenshot() returns image data rather than writing a file. Its default output is a Uint8Array; you can pass those bytes to an HTTP response or store them. For example, with Express:
import express from 'express';
import puppeteer from 'puppeteer';
const app = express();
app.get('/screenshot', async (req, res) => {
const url = typeof req.query.url === 'string' ? req.query.url : '';
if (!url) return res.status(400).send('Provide a url query parameter.');
let browser;
try {
browser = await puppeteer.launch();
const page = await browser.newPage();
await page.goto(url, { waitUntil: 'networkidle2' });
const bytes = await page.screenshot({ type: 'png' });
res.type('png').send(Buffer.from(bytes));
} catch (error) {
res.status(502).send('Could not capture the requested page.');
} finally {
if (browser) await browser.close();
}
});
app.listen(3000);This minimal handler accepts a URL from the caller. In a real service, validate and restrict destinations before navigating: an endpoint that can fetch arbitrary URLs may expose internal services or files. That is a general server-security concern, not a Puppeteer option.
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If the consumer specifically requires JSON, request base64 output with encoding: 'base64' and serialize the returned string. For a binary image endpoint, bytes with an image content type avoid the base64 representation; this is an API-design choice, not a measured Puppeteer speed claim. See Page.screenshot().
Choose the capture area
| What to capture | How | When to use it |
|---|---|---|
| Visible viewport | Default screenshot behavior | Capture only the currently visible browser area. |
| Whole document | { fullPage: true } |
Capture the page beyond the viewport height. |
| Specific rectangle | { clip: { x, y, width, height } } |
Crop a known region of the rendered page. |
| One element | Find it, then call element.screenshot() |
Capture a rendered component such as a chart or card. |
For a clipped capture, all rectangle values must describe the area you intend to capture. For an element capture, wait for the selector first so the handle exists. Puppeteer’s guide says element screenshots scroll the element into view by default if it is hidden.
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const page = await browser.newPage();
await page.goto('https://example.com', { waitUntil: 'networkidle2' });
// Entire document
await page.screenshot({ path: 'full.png', fullPage: true });
// A rectangle in the page
await page.screenshot({
path: 'region.png',
clip: { x: 20, y: 100, width: 640, height: 360 }
});
// One rendered element
const card = await page.waitForSelector('.product-card');
await card.screenshot({ path: 'card.png' });Option names and element behavior are documented in the screenshots guide and ScreenshotOptions.
Select format, quality, and destination
- PNG: the default format, suitable when you want lossless image output or transparency.
- JPEG: use
type: 'jpeg'for a JPEG. Thequalityoption ranges from 0 to 100 and applies to formats where quality is meaningful, not PNG. - Transparent background: use
omitBackground: truewhen the page background should be omitted. - File or returned data: setting
pathwrites a file; Puppeteer can infer the output type from the path extension. With no path, it returns image data instead. - Base64: set
encoding: 'base64'when a string is required, such as for a JSON payload.
await page.screenshot({
path: 'transparent.webp',
type: 'webp',
omitBackground: true
});The supported option descriptions and defaults are listed in the ScreenshotOptions reference. Check the installed Puppeteer version’s API if you depend on a particular format or option.
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Wait for the page that actually needs to be captured
waitUntil: 'networkidle2' is a useful starting point, and appears in the official screenshot example. It is not a universal readiness test: a page can render late content after network activity quiets, and pages with persistent requests may not reach the condition promptly. When a specific component determines whether the result is usable, wait for that selector instead:
await page.goto('https://example.com', { waitUntil: 'domcontentloaded' });
await page.waitForSelector('#report-ready');
await page.screenshot({ path: 'report.png', fullPage: true });Use a site-specific ready marker or other known application condition when one is available. A fixed delay can help with a known animation or delayed transition, but it is less precise than waiting for the content the capture needs.
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Manage browser resources and server workload
Close the browser whether navigation or capture succeeds or throws; the try/finally examples above provide that guarantee. Starting a fresh browser for every request is straightforward but may not suit a high-volume service. Browser reuse, context isolation, concurrency limits, memory budgets, and deployment platform should be chosen and tested against your own workload: Puppeteer’s reviewed documentation does not establish a general safe throughput or recommended pool configuration.
For shared BrowserContexts, Puppeteer documents that opening a new page or closing a page waits while a screenshot is in progress; bringToFront() does not wait. Avoid assuming that operations on a shared page are independent when captures overlap. See Page.screenshot().
Troubleshooting captures
- The screenshot is blank or incomplete: navigation completion may precede application readiness. Wait for the content selector or a page-specific ready condition before capturing.
- The capture ends at the viewport: add
fullPage: truefor the whole document; the default is a viewport capture. - The element is missing: ensure its selector matches the rendered page and wait for it with
page.waitForSelector()before callingscreenshot()on the handle. - The file was not created: provide a
path. Without one, Puppeteer returns image data rather than saving a file. - A quality setting has no effect:
qualityapplies to supported lossy formats such as JPEG, not PNG. - The server accumulates browser processes: close the browser in a
finallyblock, including on navigation and screenshot errors. - Navigation appears to hang on network idle: a page may keep network requests active. Use a different navigation condition and then wait for the application element or state that matters.
Or skip the browser setup
If you need screenshots through an API rather than running Chromium in your service, ScreenshotNeo accepts one GET request and returns an image or PDF. Its cURL example saves a WebP capture:
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 request options. Cookie banners are accepted and removed before capture, along with known consent platforms, newsletter popups, and chat widgets; each cleanup step can be turned off. Bot checks, blank pages, timeouts, failed loads, and cache hits are not billed, and the response includes page-verdict and billing headers. An MCP server provides take_screenshot, get_page_info, and capture_pdf for AI agents. The free plan includes 1,000 screenshots a month with no card; paid plans start at $5 for 3,000. Sign up free for ScreenshotNeo.
Frequently Asked Questions
Can Puppeteer return a screenshot without saving it to disk?
Yes. Omit the path option and use the returned image bytes; request encoding: 'base64' if you specifically need a string.
Does Puppeteer require a separate screenshot service?
No. Puppeteer drives a browser locally or on your server, and its Page.screenshot() method produces the capture.
Quick Recap
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