How to Maximize Chrome Window in Selenium Webdriver using Java

In Selenium automation, maximizing the browser window is often a key requirement to maintain consistent layouts and element visibility. A maximized window will reduce the chance of an element being hidden, ensuring more reliability during interaction with elements.

Selenium has different methods to maximize the window such as modifying browser options prior to launching a window.

This guide will explore two simple ways to maximize a Chrome window in Selenium Webdriver using Java.

Methods to Maximize Window in Selenium

Maximizing the browser window ensures that all web elements are fully visible and interactable during test execution. It helps prevent errors caused by hidden, off-screen, or dynamically shifting elements, leading to more stable and reliable automated tests.

Below are the commonly used methods to maximize a browser window in Selenium WebDriver when working with Java.

1. Use the maximize() method from WebDriver.Window Interface

The code snippet below implements four basic scenarios:

• Launching the Chrome browser
• Navigating to the desired URL
• Maximizing the Chrome Window
• Terminating the browser

Code:

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;

public class Max {

public static void main(String args[]) throws InterruptedException
{
System.setProperty("<Path of the ChromeDriver>");
WebDriver driver = new ChromeDriver();

// Navigate to a website
driver.get("https://www.browserstack.com/");

//Mazimize current window
driver.manage().window().maximize();

//Delay execution for 5 seconds to view the maximize operation
Thread.sleep(5000);

//Close the browser
driver.quit();
} 
}

Successful execution of the selenium script above will do the following: launch the Chrome browser, navigate to the BrowserStack website, maximize the Chrome Window, and wait for five seconds.

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2. Use the ChromeOptions class

An alternate method that can maximize the Chrome window is to use the ChromeOptions class. This method informs the Chrome browser explicitly to launch in maximized mode.

Code:

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;

public class Max {

public static void main(String args[]) throws InterruptedException
{

System.setProperty("<Path of the ChromeDriver>");

ChromeOptions options = new ChromeOptions();
options.addArguments("start-maximized");

WebDriver driver = new ChromeDriver(options);

// Navigate to a website
driver.get("https://www.browserstack.com/")

//Close the browser
driver.quit();
} 
}

Successful execution of the script above will do the following: launch the Chrome browser in maximized mode and navigate to the Browserstack website.

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Also read: How to run Selenium tests on Chrome using ChromeDriver

Maximizing a browser window prior to the execution of test cases provides better visibility to the QA. Doing so also ensures that no elements are left unidentified when tests are being executed. Implementing either of the methods explained above will help QAs avoid test failure.

Conclusion

Maximizing the browser window in Selenium WebDriver is a simple yet essential step to ensure that all elements are visible and interactable during test execution. Whether using the maximize() method or configuring the ChromeOptions class, this practice enhances test reliability and minimizes the risk of script failures.

To extend this reliability across diverse environments, BrowserStack Automate provides instant access to 3500+ real browsers and devices on the cloud. With features like parallel testing, seamless CI/CD integration, and detailed debugging logs, it ensures that scripts not only run reliably but also scale effortlessly across diverse environments, helping teams deliver flawless user experiences faster.