PDF.net is described as 'A web-based, all-in-one PDF editor that lets users upload, edit, annotate, sign, merge, split, and convert PDF and other file formats (DOC, DOCX, JPG, PNG), all in a secure, browser-based interface' and is a PDF Editor in the office & productivity category. There are more than 50 alternatives to PDF.net, not only websites but also apps for a variety of platforms, including Windows, Linux, Mac and Flathub apps. The best PDF.net alternative is PDF Arranger, which is both free and Open Source. Other great sites and apps similar to PDF.net are PDF-XChange Editor, Stirling-PDF, PDF24 Creator and PDFsam.