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Add a Custom Login Logo to WordPress

Below is all you need to customise the login page of WordPress. Add it to the bottom of your functions.php.

There are plugins available that perform this task for you, but I don’t think it’s necessary to add a plugin just for this.

Transparent PNG format images work best.

Update 2017

I have upgraded this script to use the Site Icon. You just need to upload your image using Appearance > Customise > Site Identity.

Update 2019

WordPress deprecated ‘login_headertitle’ in favour of ‘login_headertext’.