Watermark Your Images in WordPress
Watermark My Image is a plugin that adds a clean, unobtrusive watermark to images on your WordPress site. It’s a clone of the 9GAG system of watermarking and places a watermark underneath the original image. (Please note that the watermark is not placed over the original image.)
Watermark My Image comes with a host of options for customizing your watermark, including the ability to change the height, change the background color of the watermark, choose the jpg quality (when appicable), and choose which image sizes to watermark. You can also customize the text, font family, text alignment, font size and color.
This plugin is especially useful for photographers and anyone wanting to protect original images. Download Watermark My Image from the WordPress plugin repository.