Smallpdf is an online platform that provides a variety of tools for working with PDF files. Users can easily convert, compress, edit, and merge PDFs without needing to download any software. The interface is user-friendly, making it accessible for people of all skill levels. In addition to basic PDF functions, Smallpdf offers features like e-signing and document security. It supports multiple file formats, allowing users to convert documents from formats like Word and Excel into PDFs. The service is available for free with limited features, while a subscription unlocks additional capabilities.