Zamzar is an online document converter service that supports many common word processing, spreadsheet, presentation, and other document formats.

Input Formats: CSV, DOC, DOCX, EPS, ODP, ODS, ODT, PDF, PPS, PPT, PPTX, PS, PUB, RTF, VSD, WKS, WPD, WPS, XLS, and XLSX

Output Formats: CSV, DOC, HTML, MDB, ODP, ODS, ODT, PDF, PPT, PS, RTF, TIF, TXT, XLS, XLSX, and XML

Zamzar also supports document to MP3 conversion, meaning it functions as an online text-to-speech tool. Several image formats are also supported as output options for many types of files, as is the SWF video format.