Watermark Photos is a free online tool that allows users to easily add custom logos or text to their images, providing a professional way to protect their photos from unauthorized use. The process is simple: upload an image, add a personalized watermark, and download the finished product. Users can choose from various formatting options to stylize their watermarks, ensuring their branding is visible yet subtle. This service is ideal for photographers and content creators looking to safeguard their work while promoting their brand.