PhantomJS - Take a screenshot of a webpage as seen in the browser.

script.js

var website = 'http://www.google.co.uk';
var filename = './google.jpg';

var page = require('webpage').create();
page.viewportSize = {
	width: 1024,
	height: 592
};

page.open(website, function(status) {
	console.log("Status: " + status);
	if (status === "success") {
		page.render(filename);
	}
	phantom.exit();
});