For a one-off screenshot in Node.js, send a JSON POST request to Browserless’s /screenshot REST endpoint, pass your Browserless token in the URL, and save the response as binary image data. Set options.fullPage to true to request the full page rather than just the visible viewport.
Capture a screenshot with Browserless REST and Node.js
Set your Browserless token as an environment variable, then run this ES module. It checks that the token exists, sends the documented JSON request, reports HTTP errors, and writes the response bytes to screenshot.png in the current directory.
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import fs from 'node:fs/promises';
const token = process.env.BROWSERLESS_TOKEN;
if (!token) throw new Error('Set BROWSERLESS_TOKEN');
const response = await fetch(
`https://production-sfo.browserless.io/screenshot?token=${encodeURIComponent(token)}`,
{
method: 'POST',
headers: {
'Cache-Control': 'no-cache',
'Content-Type': 'application/json',
},
body: JSON.stringify({
url: 'https://example.com',
options: { fullPage: true, type: 'png' },
}),
},
);
if (!response.ok) {
throw new Error(`Screenshot request failed: ${response.status} ${response.statusText}`);
}
const bytes = Buffer.from(await response.arrayBuffer());
await fs.writeFile('screenshot.png', bytes);Keep the token outside source code: set BROWSERLESS_TOKEN in your shell or application environment, and do not commit a real token to a repository. The request body supplies the destination URL and screenshot options. The response is image bytes, not JSON, so read it as an array buffer and write the resulting buffer directly to a file.
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Run it
- Save the code as
screenshot.mjs. - Set
BROWSERLESS_TOKENin your environment using the token issued for your Browserless account. - Run
node screenshot.mjs. On success, look forscreenshot.pngin the current directory.
The example uses Browserless’s documented production SFO endpoint. If your account or deployment uses a different endpoint, use the endpoint specified for that setup.
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Choose REST or a browser session
REST is the simpler fit when one request can navigate to a page and capture it. For a workflow that must interact with the page, perform multiple browser operations, or wait for dynamic content in a custom way, connect to a managed browser with Puppeteer or Playwright instead.
| Workflow | Integration | What your script manages |
|---|---|---|
| One navigation followed by a capture | HTTP POST /screenshot |
Send the request and handle the image response. |
| Interaction or multiple browser operations before capture | Puppeteer or Playwright over Browserless’s WebSocket connection | Connect to the browser, run page operations, capture, and close the managed session. |
When using Puppeteer
Browserless’s documented Puppeteer approach uses puppeteer-core, connects with puppeteer.connect(), navigates, captures with page.screenshot(), and closes the browser in a finally block. The reason to use puppeteer-core is that the full puppeteer package downloads Chromium locally, even though the browser in this workflow runs remotely.
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When using Playwright
Browserless also documents connecting Playwright to its Chromium endpoint, capturing the page, and closing the session. Whatever browser library you choose, close the managed session when the work is done so it is released.
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Full page, viewport, and lazy-loaded content
options.fullPage: true requests a full-page capture instead of only the viewport. A full-page request does not guarantee that content which loads only after scrolling has appeared: Browserless advises using scrollPage: true before capture for lazy-loaded content, together with full-page mode for long pages.
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Image format and quality
The screenshot API supports PNG, JPEG, and WebP through its type setting. Quality is relevant to lossy formats, not PNG. Check the current Browserless API reference for accepted option values and their exact request locations before relying on a particular combination; the REST API and BrowserQL are distinct interfaces, and their fields should not be assumed interchangeable.
Capture an element or a rectangle
For a specific element, the REST screenshot documentation describes a top-level selector that waits for the element and crops the screenshot to its bounds. For a fixed rectangle, use options.clip. These are different targeting approaches: use a selector when the page element defines the bounds, and a clip when you already know the rectangle.
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Troubleshoot blank, incomplete, or failed captures
- The request fails with an HTTP status error: The example throws with the returned status and status text for non-success responses. Check that the token is set correctly and that the URL, JSON body, and endpoint match your Browserless setup.
- The saved image is blank: The destination may have returned a blank page, or its content may not have loaded before capture. Check the target URL and loading behavior; for content that appears only after scrolling, use the documented scrolling option.
- An element is missing: Confirm that the selector identifies an element present on the page and that the page has had time to render it. The REST selector behavior waits for the element, but a missing element can still indicate a page or access problem.
- The image shows a CAPTCHA, 403, or access-denied page: The site may be blocking automation. Browserless documents a separate
/unblockAPI for certain anti-bot cases, but that does not mean every site can be captured. - The capture cuts off content: Check that you requested
fullPage: true. If lower-page images load lazily, arrange scrolling before capture as well. - A browser workflow holds resources longer than expected: Close the Puppeteer or Playwright session when finished, including on errors, by putting cleanup in a
finallyblock.
Or skip the browser setup
ScreenshotNeo is a website screenshot API and MCP server. Its one-request API can return an image or PDF without you connecting a browser session in your Node.js code. Here is the Node.js request pattern; replace YOUR_API_KEY with your key and change the target URL as needed. See the ScreenshotNeo API documentation for request options.
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Frequently Asked Questions
Does the Node.js example need a third-party HTTP package?
No. It uses Node.js’s built-in fetch and the built-in node:fs/promises module.
Can Browserless guarantee a screenshot of a site that blocks automation?
No. A site may show an anti-bot challenge or deny access; Browserless’s documented /unblock API covers certain cases, not every site.
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