Watermarkly is an online tool that allows users to easily add watermarks to PDF documents. It offers a user-friendly interface for applying text, images, or logos as watermarks, helping to indicate ownership, confidentiality, or document status. Unlike more complex software like Adobe Acrobat, Watermarkly simplifies the process, enabling users to watermark multiple PDFs quickly without the need for extensive editing skills. The service is accessible on various devices and supports various file formats, making it a convenient choice for anyone looking to protect their documents or promote their brand.