STDU Explorer is a file manager for previewing and managing PDF, DjVu

DjVu

DjVu is a computer file format designed primarily to store scanned documents, especially those containing a combination of text, line drawings, and photographs. It uses technologies such as image layer separation of text and background/images, progressive loading, arithmetic coding, and lossy...

, Comic Book Archive (CBR or CBZ), XPS

XML Paper Specification

Open XML Paper Specification , is an open specification for a page description language and a fixed-document format originally developed by Microsoft as XML Paper Specification that was later standardized by Ecma International as international standard ECMA-388...

 and image file formats such as BMP, GIF

GIF

The Graphics Interchange Format is a bitmap image format that was introduced by CompuServe in 1987 and has since come into widespread usage on the World Wide Web due to its wide support and portability....

, JPEG

JPEG

In computing, JPEG . The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality. JPEG typically achieves 10:1 compression with little perceptible loss in image quality....

, PNG, PSD and WMF

Windows Metafile

Windows Metafile is a graphics file format on Microsoft Windows systems, originally designed in the 1990s. Windows Metafiles are intended to be portable between applications and may contain both vector graphics and bitmap components....

. It works under Microsoft Windows, and is free

Freeware

Freeware is computer software that is available for use at no cost or for an optional fee, but usually with one or more restricted usage rights. Freeware is in contrast to commercial software, which is typically sold for profit, but might be distributed for a business or commercial purpose in the...

 for non-commercial use.

Features

STDU Explorer supports standard operations such as cut, copy, paste, move, delete, rename, context menu

Context menu

A context menu is a menu in a graphical user interface that appears upon user interaction, such as a right mouse click or middle click mouse operation...

integration and tree views of folders. The program has a preview pane for flipping through multipage files, it can generate adjustable thumbnail previews of the images and the content of PDF e-books.