Some websites will allow you to upload a file type, you might want to upload your CV to a job website or image to a website like Facebook.
One file only.
2 MB limit.
Allowed types: gif, jpg, png, bmp, eps, tif, pict, psd, txt, rtf, html, odf, pdf, doc, docx, ppt, pptx, xls, xlsx, xml, avi, mov, mp3, ogg, wav, bz2, dmg, gz, jar, rar, sit, svg, tar, zip.