PDF24 provides a free Java based online document reader which runs directly in your browser. You do not need to install any other software to view multiple document formats. The reader can read local files as well as files located in the web which are reachable via an URL.
The reader can read and show PDF files, HTML, Text, Images and the file formats of the programs Word, Powerpoint, Excel and OpenOffice. The reader has a toolbar which contains a lot of nice features. You can rotate, zoom, view in full screen mode, print and things like that. The reader is free for everyone.