There are many online file converters like DocsPal, Convert Files etc. Fileminx is another free online service which can easily convert files to documents, music, images and videos formats. It has pretty good conversion options and these are based on the input file formats. It supports files upto 50MB in size and is fast and easy to convert as well.
Formats Supported;
Documents;
- DOC, DOCX, LWP, MediaWiki, ODT, PDF, RTF, TXT, Word 6, Word 97-03, WPS
Images
- BMP, GIF, ICO, JPEG, JPG, PCX, PIC, PICT, PNG, PSD, SUN, TGA, TIF, TIFF, WMF
Music
- AAC, AIF, AIFF, AU, FLAC, iPhone, iPod, MP2, MP3, OGG, RA, SND, VOC, WAV, WMA
Video
- 3G2, 3GP, ASF, AVI, DIVX, DVD, Flash, GIF, iPod, MOV, MP4, MPEG, MPG, PSP, RM, WMV, XVID
Fileminx is a nice service to try for online file conversions.