By Default WordPress login screen comes with a WordPress logo at the center of the Login page,changing that to your own logo gives more professional look to your WordPress site & that also increases your website brand value.
There are lot of Plugins which can help you customize the login screen, but I would suggest not to use plugins for simple customizations like this.
In this article, you’ll learn how to Customize WordPress login logo without using plugin.Believe me this hack can improve the Branding of your WordPress-powered site a lot.
How to Change WordPress Login Logo :
QUICK NOTE : The WordPress Login Logo resides in wp-admin/images folder of your WordPress setup.
Now the first thing you should do for customizing the logo is to create an png image with transperent background of size 274px width & 63px height & save the image with name logo-login.png.
Now using an FTP client of your choice upload the logo you created ie; logo-login.png to wp-admin/images folder.
That’s it. Refresh your login screen & you can see your new logo live on the website.