STDU Viewer has been discontinued. Similar apps include SumatraPDF, which is free and open source. Other options are Okular, Foxit PDF Reader, Evince and MuPDF. PDF Readers like STDU Viewer are a crowded field, with more than 50 alternatives for Windows, Linux, Android, Mac and the web.
DocsPal is a free online file converter. Convert your files online, instantly and for free: documents, video, audio, images, e-books, archives. You can also view your document directly in our Viewer page. And there is no need to download any software.
Deepin Image Viewer is an image viewer produced by Deepin Technology. It is fashion and smooth, supports multiple image formats, user can view any kind of image.
China
Merge PDF is a user friendly PDF Reader. It is fully compatible with PDF file formats. It is a great value in comparison to other PDF Readers. It is part of Merge Soft Office. Now, Merge Soft Office is built on true 64-bit technology and it is being developed in 32-bit as well...
Hexye PDF Tools is a fast, privacy-focused online suite for editing PDFs — split, rotate, merge, and more — directly in your browser without uploading files.
Italy
EU
A privacy-first PDF tool suite that processes files entirely in your browser. Merge, split, and convert PDFs without ever uploading them to a server.
