Not sure what type of file you have or unsure if the file extension is correct? No problem. File Viewer Plus includes proprietary file identification technology which will inspect your file and identify the format. Most likely, your file will be one of the over 400 file formats supported by File Viewer Plus, and the file will be automatically opened for viewing. If you file is unsupported, the software will still indicate the likely file format, and provide more information and additional resources.