PDF Protector vs STDU Viewer

A side-by-side look at PDF Protector and STDU Viewer. For an in-depth review of either product, follow the links below.

PDF Protector

Security & Privacy

PDF Protector is a software tool that allows users to password protect their PDF documents and restrict certain permissions like printing, editing and copying text. It has a simple interface to add security to PDFs within a few clicks.

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STDU Viewer

Office & Productivity

STDU Viewer is a free portable software used to open and view various file types like PDFs, images, Microsoft Office documents, emails, archives, EPUB books and more. It supports viewing over 20 file formats and includes features like tabbed browsing, thumbnail previews, bookmarks and annotations.

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