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Change Screen Resolution

Learn how to change the screen resolution for your Selenium tests that run on desktop browsers.

As part of responsive web app testing scenarios, you might want to test your application on different screen resolutions. With the custom resolution capability, you can set a supported screen resolution for a desktop-OS version combination and observe your application behavior.

By default, on BrowserStack, all Selenium tests that run on desktop run on a screen resolution of1920x1080.

In this guide, you will learn:

Note: Browser window is not maximized upon launch in any Selenium test. Changing the resolution doesn’t maximize the browser. Check out how to maximize and resize the browser window if you want to maximize the browser window upon launch.

Setting the Capability

The following table provides information about supported screen resolution values for different desktop-OS version combinations.

Capability Description Expected values
resolution Set the resolution of your VM before beginning your test A string. Default resolution is 1920x1080

Supported resolutions:
Windows (XP): 800x600, 1024x768, 1280x800, 1280x1024, 1366x768, 1440x900, 1680x1050, 1600x1200, 1920x1200, 1920x1080, 2048x1536, 2560x1600, and 2560x1920

Windows (7): 800x600, 1024x768, 1280x800, 1280x1024, 1366x768, 1440x900, 1680x1050, 1600x1200, 1920x1200, 1920x1080, 2048x1536, 2560x1600, 2560x1920, and 3840x2160

Windows (8, 8.1, 10, 11): 1024x768, 1280x800, 1280x1024, 1366x768, 1440x900, 1680x1050, 1600x1200, 1920x1200, 1920x1080, 2048x1536, 2560x1600, 2560x1920, and 3840x2160

OS X (Ventura ,Monterey, Big Sur, Catalina, Mojave, and High Sierra): 1024x768, 1280x960, 1280x1024, 1600x1200, 1920x1080, 2560x1440, 2560x1600, and 3840x2160

OS X (All other versions): 1024x768, 1280x960, 1280x1024, 1600x1200, and 1920x1080

You can set the resolution capability as shown in the following example code snippet that sets the value to 1024x768.

// Change resolution to 1024x768

MutableCapabilities capabilities = new MutableCapabilities();
HashMap<String, Object> browserstackOptions = new HashMap<String, Object>();
browserstackOptions.put("resolution", "1024x768");
// Set the selenium version to 4.0.0.
browserstackOptions.put("seleniumVersion", "4.0.0");
capabilities.setCapability("bstack:options", browserstackOptions);

// Change resolution to 1024x768

var capabilities = {
	'bstack:options' : {
		"resolution" : "1024x768",
        // Set the selenium version to 4.0.0.
		"seleniumVersion" : "4.0.0",
	},
}

// Change resolution to 1024x768

// For Chrome browser
ChromeOptions capabilities = new ChromeOptions();
capabilities.BrowserVersion = "95.0";
Dictionary<string, object> browserstackOptions = new Dictionary<string, object>();
browserstackOptions.Add("resolution", "1024x768");
// Set the selenium version to 4.0.0.
browserstackOptions.Add("seleniumVersion", "4.0.0");
capabilities.AddAdditionalOption("bstack:options", browserstackOptions);

// For Edge browser
EdgeOptions capabilities = new EdgeOptions();
capabilities.BrowserVersion = "95.0";
Dictionary<string, object> browserstackOptions = new Dictionary<string, object>();
browserstackOptions.Add("resolution", "1024x768");
// Set the selenium version to 4.0.0.
browserstackOptions.Add("seleniumVersion", "4.0.0");
capabilities.AddAdditionalOption("bstack:options", browserstackOptions);

// For IE browser
InternetExplorerOptions capabilities = new InternetExplorerOptions();
capabilities.BrowserVersion = "11.0";
Dictionary<string, object> browserstackOptions = new Dictionary<string, object>();
browserstackOptions.Add("resolution", "1024x768");
// Set the selenium version to 4.0.0.
browserstackOptions.Add("seleniumVersion", "4.0.0");
capabilities.AddAdditionalOption("bstack:options", browserstackOptions);

// For Firefox browser
FirefoxOptions capabilities = new FirefoxOptions();
capabilities.BrowserVersion = "95.0";
Dictionary<string, object> browserstackOptions = new Dictionary<string, object>();
browserstackOptions.Add("resolution", "1024x768");
// Set the selenium version to 4.0.0.
browserstackOptions.Add("seleniumVersion", "4.0.0");
capabilities.AddAdditionalOption("bstack:options", browserstackOptions);
# Change resolution to 1024x768

$caps = array(
	'bstack:options' => array(
		"resolution" => "1024x768",
        //Set the selenium version to 4.0.0.
		"seleniumVersion" => "4.0.0",
	),
)
# Change resolution to 1024x768

desired_cap = {
    'bstack:options' : {
        "resolution" : "1024x768",
        # Set the selenium version to 4.0.0.
        "seleniumVersion" : "4.0.0",
},
}
# Change resolution to 1024x768

capabilities = {
	'bstack:options' => {
		"resolution" => "1024x768",
        #Set the selenium version to 4.0.0.
		"seleniumVersion" => "4.0.0",
	},
}

The following table provides information about supported screen resolution values for different desktop-OS version combinations.

Capability Description Expected values
resolution Set the resolution of your VM before beginning your test A string. Default resolution is 1920x1080

Supported resolutions:
Windows (XP): 800x600, 1024x768, 1280x800, 1280x1024, 1366x768, 1440x900, 1680x1050, 1600x1200, 1920x1200, 1920x1080, 2048x1536, 2560x1600, and 2560x1920

Windows (7): 800x600, 1024x768, 1280x800, 1280x1024, 1366x768, 1440x900, 1680x1050, 1600x1200, 1920x1200, 1920x1080, 2048x1536, 2560x1600, 2560x1920, and 3840x2160

Windows (8, 8.1, 10, 11): 1024x768, 1280x800, 1280x1024, 1366x768, 1440x900, 1680x1050, 1600x1200, 1920x1200, 1920x1080, 2048x1536, 2560x1600, 2560x1920, and 3840x2160

OS X (Ventura ,Monterey, Big Sur, Catalina, Mojave, and High Sierra): 1024x768, 1280x960, 1280x1024, 1600x1200, 1920x1080, 2560x1440, 2560x1600, and 3840x2160

OS X (All other versions): 1024x768, 1280x960, 1280x1024, 1600x1200, and 1920x1080

You can set the resolution capability as shown in the following example code snippet that sets the value to 1024x768.

// Change resolution to 1024x768

DesiredCapabilities caps = new DesiredCapabilities();
caps.setCapability("resolution", "1024x768");
// Change resolution to 1024x768

var capabilities = {
 "resolution" : "1024x768"
}
// Change resolution to 1024x768

// For Chrome browser
OpenQA.Selenium.Chrome.ChromeOptions chromeCapability = new OpenQA.Selenium.Chrome.ChromeOptions();
capability.AddAdditionalCapability("resolution", "1024x768", true);

// For Edge browser
OpenQA.Selenium.Edge.EdgeOptions edgecapability = new OpenQA.Selenium.Edge.EdgeOptions();
capability.AddAdditionalCapability("resolution", "1024x768");

// For IE browser
OpenQA.Selenium.IE.InternetExplorerOptions ieCapability = new OpenQA.Selenium.IE.InternetExplorerOptions();
capability.AddAdditionalCapability("resolution", "1024x768", true);

// For Firefox browser
OpenQA.Selenium.Firefox.FirefoxOptions firefoxCapability = new OpenQA.Selenium.Firefox.FirefoxOptions();
capability.AddAdditionalCapability("resolution", "1024x768", true);

// For Safari browser
OpenQA.Selenium.Safari.SafariOptions safariCapability = new OpenQA.Selenium.Safari.SafariOptions();
safariCapability.AddAdditionalCapability("resolution", "1024x768");
# Change resolution to 1024x768

$caps = array(
 "resolution" => "1024x768"
);
# Change resolution to 1024x768

capabilities = {
 "resolution": "1024x768"
}
# Change resolution to 1024x768

caps = Selenium::WebDriver::Remote::Capabilities.new
caps["resolution"] = "1024x768"

Sample screenshots before and after resolution change

In the following sample screenshot, for different resolutions, we ran the sample tests to open www.browserstack.com on Chrome 88 browser running on Windows 10:

Resolution - 1024x768

Low Screen Resolution screenshot

Resolution - 2048x1536

High Screen Resolution screenshot

Maximize window with resolution - 2048x1536

The largest supported screen resolution for Windows machines is 2048x1536. If you run the maximize window steps, then your test with the largest screen resolution for Windows as shown in the following image:

Maximized High Screen Resolution screenshot

Example code snippets

You can set the resolution capability as shown in the following example code snippet.

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.MutableCapabilities;
import org.openqa.selenium.remote.RemoteWebDriver;
import java.net.URL;
import java.util.HashMap;

public class testsel4{
	public static final String URL = "https://YOUR_USERNAME:YOUR_ACCESS_KEY@hub-cloud.browserstack.com/wd/";
	public static void main(String[] args) throws Exception {
		 MutableCapabilities caps = new MutableCapabilities();
		 caps.setCapability("browserName", "chrome");
		 HashMap<String, Object> browserstackOptions = new HashMap<String, Object>();
		 browserstackOptions.put("os", "Windows");
		 browserstackOptions.put("osVersion", "10");
		//  Set the resolution using the 'resolution' capability.
		 browserstackOptions.put("resolution", "1024x768");
		 browserstackOptions.put("buildName", "Java Screen Resolution test Sample Build");
		 browserstackOptions.put("sessionName", "Screen Resolution test");
		//  Set the selenium version.
		 browserstackOptions.put("seleniumVersion", "4.0.0");
		caps.setCapability("bstack:options", browserstackOptions);
		 WebDriver driver = new RemoteWebDriver(new URL(URL), caps);
		 driver.get("https://www.browserstack.com");
		 driver.quit();
	}
}
const webdriver = require('selenium-webdriver');
const fs = require('fs')

// Input capabilities
const capabilities = {
  'bstack:options' : {
  "os" : "Windows",
  "osVersion" : "10",
  'buildName': 'NodeJS- Screen Resolution test Sample Build',
  'sessionName': 'Screen Resolution test',
  // Set the resolution using the 'resolution' capability.
  "resolution" : "1024x768",
  // Set the selenium version.
  "seleniumVersion" : "4.0.0",
  },
  "browserName" : "Chrome",
  }
async function runScreenResolution () {
  let driver = new webdriver.Builder()
    .usingServer('http://YOUR_USERNAME:YOUR_ACCESS_KEY@hub-cloud.browserstack.com/wd/hub')
    .withCapabilities(capabilities)
    .build();
  await driver.get("http://www.browserstack.com");
  await driver.quit();
}
runScreenResolution();

using System;
using System.Collections.Generic;
using System.IO;
using Newtonsoft.Json;
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;
using OpenQA.Selenium.Remote;
namespace SeleniumTest
{
    class Test
    {
        static void Main(string[] args)
        {
            RemoteWebDriver driver;
            ChromeOptions capabilities = new ChromeOptions();
            capabilities.BrowserVersion = "95.0";
            Dictionary<string, object> browserstackOptions = new Dictionary<string, object>();
            browserstackOptions.Add("os", "Windows");
            browserstackOptions.Add("osVersion", "10");
            // Set the resolution using the 'resolution' capability.
            browserstackOptions.Add("resolution", "1024x768");
            browserstackOptions.Add("buildName", "Csharp- Screen Resolution test Sample Build");
            browserstackOptions.Add("sessionName", "Screen Resolution test");
            // Set the selenium version.
            browserstackOptions.Add("seleniumVersion", "4.0.0");
            browserstackOptions.Add("userName", "YOUR_USERNAME");
            browserstackOptions.Add("accessKey", "YOUR_ACCESS_KEY");
            capabilities.AddAdditionalOption("bstack:options", browserstackOptions);
            
            driver = new RemoteWebDriver(
                new Uri("https://hub-cloud.browserstack.com/wd/hub/"), capabilities
                );
            driver.Navigate().GoToUrl("https://www.browserstack.com/");
            driver.Quit();
        }
    }
}

from selenium import webdriver
desired_cap = {
    'bstack:options' : {
        "os" : "Windows",
        "osVersion" : "10",
        # Set the resolution using the 'resolution' capability.
        "resolution" : "1024x768",
        # Set the selenium version.
        "seleniumVersion" : "4.0.0",
},
"browserName" : "Chrome",
}
driver = webdriver.Remote(
    desired_capabilities=desired_cap,
    command_executor='https://YOUR_USERNAME:YOUR_ACCESS_KEY@hub-cloud.browserstack.com/wd/hub'
    )
driver.get("https://www.browserstack.com")
driver.quit()


require	'rubygems'
require	'selenium-webdriver'
require 'json'

#Input Capabilities
capabilities = Selenium::WebDriver::Remote::Capabilities.new
capabilities = {
	'bstack:options' => {
	"os" => "Windows",
	"osVersion" => "10",
	"build" => "Ruby Screen Resolution test Sample Build"
	"name" => "Screen Resolution test"
	# Set the resolution using the 'resolution' capability.
	"resolution" => "1024x768",
	# Set the selenium version.
	"seleniumVersion" => "4.0.0",
	},
	"browserName" => "Chrome",
	}
driver = Selenium::WebDriver.for(:remote,
	:url => "http://YOUR_USERNAME:YOUR_ACCESS_KEY@hub-cloud.browserstack.com/wd/hub",
	:desired_capabilities => capabilities)
	driver.navigate.to "http://www.browserstack.com"
	driver.quit
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.remote.RemoteWebDriver;
import java.net.URL;

public class test{
	public static final String URL = "https://YOUR_USERNAME:YOUR_ACCESS_KEY@hub-cloud.browserstack.com/wd/hub";
	public static void main(String[] args) throws Exception {
		 DesiredCapabilities caps = new DesiredCapabilities();
		 caps.setCapability("os_version", "7");
		 caps.setCapability("browser", "chrome");
		 caps.setCapability("os", "Windows");
		//  Set the resolution using the 'resolution' capability.
		 caps.setCapability("resolution", "1680x1050");
		 caps.setCapability("name", "Screen Resolution test"); // test name
		 caps.setCapability("build", "Java Screen Resolution test Sample Build"); // CI/CD job or build name
		 WebDriver driver = new RemoteWebDriver(new URL(URL), caps);
		 driver.get("https://www.browserstack.com");
		 driver.quit();
	}
}
const webdriver = require('selenium-webdriver');
const fs = require('fs')

// Input capabilities
const capabilities = {
  'browserName': 'chrome',
  'os': 'windows',
  'os_version': '10',
  'build': 'NodeJS- Screen Resolution test Sample Build',
  'name': 'Screen Resolution test',
  // Set the resolution using the 'resolution' capability.
  'resolution': '1024x768'
}
async function runScreenResolution () {
  let driver = new webdriver.Builder()
    .usingServer('http://YOUR_USERNAME:YOUR_ACCESS_KEY@hub-cloud.browserstack.com/wd/hub')
    .withCapabilities(capabilities)
    .build();
  await driver.get("http://www.browserstack.com");
  await driver.quit();
}
runScreenResolution();
using System;
using System.IO;
using Newtonsoft.Json;
using OpenQA.Selenium;
using OpenQA.Selenium.Remote;
namespace SeleniumTest
{
    class Program
    {
        static void Main(string[] args)
        {
            RemoteWebDriver driver;
            OpenQA.Selenium.Chrome.ChromeOptions capability = new OpenQA.Selenium.Chrome.ChromeOptions();
            capability.AddAdditionalCapability("os_version", "10", true);
            capability.AddAdditionalCapability("os", "Windows", true);
            capability.AddAdditionalCapability("name", "Screen Resolution test", true); // test name
            capability.AddAdditionalCapability("build", "Csharp- Screen Resolution test Sample Build", true); // CI/CD job or build name
            capability.AddAdditionalCapability("browserstack.user", "YOUR_USERNAME", true);
            capability.AddAdditionalCapability("browserstack.key", "YOUR_ACCESS_KEY", true);
            // Set the resolution using the 'resolution' capability.
            capability.AddAdditionalCapability("resolution", "1024x768", true);
            driver = new RemoteWebDriver(
                new Uri("https://hub-cloud.browserstack.com/wd/hub/"), capability
                );
            driver.Navigate().GoToUrl("https://www.browserstack.com/");
            driver.Quit();
        }
    }
}
from selenium import webdriver
desired_cap = {
        "browser": "chrome",
        "os": "Windows",
        "os_version": "10",
        'build': 'Python Screen Resolution test Sample Build',
        'name': 'Screen Resolution test',
        # Set the resolution using the 'resolution' capability.
        'resolution': '1024x768'
        }
driver = webdriver.Remote(
    desired_capabilities=desired_cap,
    command_executor='https://YOUR_USERNAME:YOUR_ACCESS_KEY@hub-cloud.browserstack.com/wd/hub'
    )
driver.get("https://www.browserstack.com")
driver.quit()
require	'rubygems'
require	'selenium-webdriver'
require 'json'

#Input Capabilities
caps = Selenium::WebDriver::Remote::Capabilities.new
caps["os"] = "Windows"
caps["os_version"] = "10"
caps["browser"] = "chrome"
caps["build"] = "Ruby Screen Resolution test Sample Build"
caps["name"] = "Screen Resolution test"
caps["javascriptEnabled"] = "true"
# Set the resolution using the 'resolution' capability.
caps["resolution"] = "1024x768"

driver = Selenium::WebDriver.for(:remote,
	:url => "http://YOUR_USERNAME:YOUR_ACCESS_KEY@hub-cloud.browserstack.com/wd/hub",
	:desired_capabilities => caps)
	driver.navigate.to "http://www.browserstack.com"
	driver.quit

Points to remember

  • The resolution capability only controls the screen resolution in desktop browsers.
  • You can set the screen resolution only at the start of a test.
  • You cannot change the screen resolution during test runtime.
  • Ensure that screen resolution is large enough when changing browser window size during test runtime so that page elements do not appear off-screen.

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