With Office Documents Viewer (Free), you can open documents that are stored on the internal memory of SD cards, in Dropbox folders, or even downloaded files or those sent as email attachments. Both the interface and functions are very simple, making it easy to use. Office Documents Viewer (Free) has a zoom option to enlarge less visible areas, and it also lets you make copies to print, send, or listen to with the built-in document reader.
With Office Documents Viewer (Free) you can open almost all formats from OpenOffice, LibreOffice, Microsoft Office 2007, and Microsoft Office 97, as well as other formats such as RTF, HTML, TXT, CSV, PDF, and TSV. This is a great tool for working with many different formats at once, but it also has some drawbacks. For example, large spreadsheets take too long to open, and sometimes they don't fully appear. Also, documents with images can only be viewed if the format is supported by the Android browser. Finally, password-protected documents cannot be displayed in any way.