How to save screenshot in Puppeteer as PNG?

You can take a screenshot in Puppeteer using

await page.screenshot({path: 'screenshot.png'});

The path is relative to the current working directory.

Want to have a screenshot in a size different to 800x600? See How to set screenshot size in Puppeteer?

Full example:

// Minimal puppeteer example
const puppeteer = require('puppeteer');
(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.goto('https://techoverflow.net', {waitUntil: 'domcontentloaded'});
  // Screenshot to verify result
  await page.screenshot({path: 'screenshot.png'});
  // Cleanup
  await browser.close();
})();