What is the default port for Selenium Grid?

Answer

Default Port for Selenium Grid

The default port for Selenium Grid Hub is 4444.

Access the Grid Hub at:

CODE

http://localhost:4444/grid/console     (Selenium 3)
http://localhost:4444                  (Selenium 4)
http://localhost:4444/status           (Selenium 4 health check)

Starting Selenium Grid Hub (Selenium 3):

Bash

# Start the hub on default port 4444
java -jar selenium-server-standalone-3.141.59.jar -role hub

# Start hub on custom port
java -jar selenium-server-standalone-3.141.59.jar -role hub -port 5555

Registering a Node to the Hub:

Bash

# Register node to hub on port 4444
java -jar selenium-server-standalone-3.141.59.jar \
  -role node \
  -hub http://localhost:4444/grid/register

Selenium 4 Grid (new unified approach):

Bash

# Start Selenium 4 Grid (hub + node in one)
java -jar selenium-server-4.x.x.jar standalone

# Or separate hub and node
java -jar selenium-server-4.x.x.jar hub      # Port 4444
java -jar selenium-server-4.x.x.jar node     # Port 5555 (node default)

RemoteWebDriver connecting to Grid:

Java

// Connect test to Selenium Grid hub
DesiredCapabilities caps = new DesiredCapabilities();
caps.setBrowserName("chrome");

WebDriver driver = new RemoteWebDriver(
    new URL("http://localhost:4444/wd/hub"),
    caps
);
driver.get("https://example.com");

Port summary:

Component	Default Port
Selenium Grid Hub	4444
Selenium Node	5555 (configurable)
Grid Console UI	4444/grid/console

Key point: Port 4444 is the default. Always verify the hub is running at this port before connecting nodes or test scripts.