[selenium] How can I control Chromedriver open window size?

I'm using Selenium WebDriver for automation and I'm using Chromedriver.

I have noticed that when my driver runs and opens the chrome browser, it opens the browser with a strange size. I tried to fixed it but in vain.

Does anybody know how can I change it?

Following chrome options worked for me for headless chrome:

IN JAVA:

ChromeOptions chromeOptions = new ChromeOptions();
chromeOptions.addArguments("--window-size=1920,1080");
chromeOptions.setHeadless(true);
driver = new ChromeDriver(chromeOptions);
driver.get("your-site");
driver.manage().window().maximize();

selenium-java: 3.8.1

chromedriver: 2.43

Chrome: v69-71

In java/groovy try:

import java.awt.Toolkit;
import org.openqa.selenium.Dimension;         
import org.openqa.selenium.Point;

...

java.awt.Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();

Dimension maximizedScreenSize = new Dimension((int) screenSize.getWidth(), (int) screenSize.getHeight());
driver.manage().window().setPosition(new Point(0, 0));
driver.manage().window().setSize(maximizedScreenSize);

this will open browser in fullscreen

Use Dimension Class for controlling window size.

Dimension d = new Dimension(1200,800);  //(x,y coordinators in pixels) 
driver.manage().window().setSize(d);

Python

Drivers

chrome = 57.0.2987.133
chromedriver = 2.27.440174

Code:

from selenium.webdriver.chrome.options import Options

chrome_options = Options()
chrome_options.add_argument("--window-size=1920,1080")
driver = Chrome(chrome_options=chrome_options)

If you're using the Facebook language binding for php try this:

$driver->manage()->window()->setSize(new WebDriverDimension(1024,768));

#use chrome webdriver

driver = webdriver.Chrome('path to /chromedriver')
driver.set_window_size(1400,1000)

If you are using Clojure and https://github.com/semperos/clj-webdriver you can use this snippet to resize the browser.

(require '[clj-webdriver.taxi :as taxi])

; Open browser
(taxi/set-driver! {:browser :chrome} "about:blank")

; Resize browser
(-> taxi/*driver* (.webdriver) (.manage) (.window) 
  (.setSize (org.openqa.selenium.Dimension. 0 0)))

Use this for your custom size:

driver.manage().window().setSize(new Dimension(1024,768));

you can change your dimensions as per your requirements.

Ruby version:

caps = Selenium::WebDriver::Remote::Capabilities.chrome("chromeOptions" => {"args"=> ["--window-size=1280,960"]})

url = "http://localhost:9515"  # if you are using local chrome or url = Browserstack/ saucelabs hub url if you are using cloud service providers.

 Selenium::WebDriver.for(:remote, :url => url, :desired_capabilities => caps)

resize chrome is buggy in latest chromedrivers , it fails intermittanly with this failure message.

                        unknown error: cannot get automation extension
from timeout: cannot determine loading status
from timeout: Timed out receiving message from renderer: -65.294
  (Session info: chrome=56.0.2924.76)
  (Driver info: chromedriver=2.28.455517 (2c6d2707d8ea850c862f04ac066724273981e88f)

And resizeTo via javascript also not supported for chrome started via selenium webdriver. So the last option was using command line switches.

C# version of @yonatan-kiron's answer, and Selenium's using statement from their example code.

ChromeOptions chromeOptions = new ChromeOptions();
chromeOptions.AddArgument("--window-size=1300,1000");

using (IWebDriver driver = new ChromeDriver(chromeOptions))
{
    ...
}

Try with driver.manage.window.maximize(); to maximize window.

RUBY

Approach #1

options = {
      'chromeOptions' => {
          'args' => ['start-fullscreen']
      }
  }

caps = Selenium::WebDriver::Remote::Capabilities.chrome(options)
@driver = Selenium::WebDriver.for :chrome, desired_capabilities: caps

Approach #2

options = {
      'chromeOptions' => {
          'args' => ['window-size=640,480']
      }
  }

caps = Selenium::WebDriver::Remote::Capabilities.chrome(options)
@driver = Selenium::WebDriver.for :chrome, desired_capabilities: caps

Approach #3

max_width, max_height = @driver.execute_script("return [window.screen.availWidth, window.screen.availHeight];")
@driver.manage.window.resize_to(max_width, max_height)

Approach #4

@driver.manage.window.maximize

Approach #5

target_size = Selenium::WebDriver::Dimension.new(1600, 1268)
@driver.manage.window.size = target_size

Approach #6

@driver.manage.window.resize_to(640, 480)

Approach #7

@driver.execute_script("window.resizeTo(640, 480);")

try this

using System.Drawing;
driver.Manage().Window.Size = new Size(width, height);