File formats supported by Google Docs Viewer
Google Document viewer is an excellent service for opening several common file formats online itself rather than downloading it. This way you can view less important files online and not get in the mess of downloading the file and then deleting it. You can upload your files on google docs and send its link to people you want to share that document with. It supports most common formats like Adobe PDF and MS Word, excel, powerpoint,etc. This online service by google does not support all file formats to be read or accessible online. But it keeps adding new file formats as time passes. It recently added .ZIP and .RAR , 2 most common compression file formats by WinZip and WinRAR. Here is a list of file formats that it supports :
Archive file types (.ZIP and .RAR) (Latest addition)
Microsoft Word (.DOC and .DOCX)
Microsoft Excel (.XLS and .XLSX)
Microsoft PowerPoint (.PPT and .PPTX)
Adobe Portable Document Format (.PDF)
Apple Pages (.PAGES)
Adobe Illustrator (.AI)
Adobe Photoshop (.PSD)
Autodesk AutoCad (.DXF)
Tagged Image File Format (.TIFF)
Scalable Vector Graphics (.SVG)
PostScript (.EPS, .PS)
TrueType (.TTF)
XML Paper Specification (.XPS)