Although it promises to allow you to view Microsoft Word and Excel files even when you don't have the source program, Fast Doc Viewer fails to deliver. The interface on this executable program resembles Windows Explorer, with a simple tree list of directories. There aren't any filters or other options to specify the type of file you want to view, but the publisher promises support for more than 15 formats, including Word, Excel, and TIFF files.
When you open a folder, however, no files in any format appear. The help file wouldn't open, and the publisher's Web site didn't offer a user manual or other guidance. A persistent nag screen adds to the annoyance. Fast Doc Viewer was more of a hindrance than a help, so we can't recommend this faulty program.