CAJViewer

CAJViewer is a desktop document reader developed by Tsinghua Tongfang Optical Disc Co., Ltd. It is designed to open and display CAJ, NH, and KDH files—the proprietary formats widely used by the China National Knowledge Infrastructure (CNKI) for academic journals, theses, and conference papers.

The software offers smooth page rendering and essential reading tools, including zoom and fit-to-page options, single-page or continuous scrolling views, and page rotation. It supports quick navigation through thumbnail previews and table-of-contents panes, making it easier to move between sections. Users can search within documents, select and copy text or images when permitted by the source file, create bookmarks, and print.

CAJViewer is aimed at students, researchers, librarians, and professionals who regularly access CNKI materials and need a reliable way to read files that may not display correctly in general-purpose PDF readers. It is lightweight, straightforward, and commonly distributed alongside CNKI downloads or via the developer’s official channels.

CAJViewer is developed by Tsinghua Tongfang Optical Disc Co.,LTD. and is used by 143 users of Software Informer. The names of program executable files are CAJVieweru.exe, CAJViewer.exe, AppLoc.exe, Caj.exe and Viewer.exe. Works with nh, caj, kdh, teb and caa file types. This particular product is not fit to be reviewed by our informers.