Our whitelist of file types served directly to the web has for a long time included .doc, .xls, and .ppt. With the advent of new XML-based Microsoft Office formats, and with the popularity of LibreOffice and OpenOffice.org, there have been requests for whitelisting these additional file types. As of yesterday, the new Office XML filetypes — .docx, .xlsx, .pptx, etc. — as well as ODF file types — .odt, .ods, .odp, etc. — will also be served directly to the web.

In addition to files you place in your locker, this also affects files uploaded to your website via the standard upload feature of apps such as MediaWiki and WordPress.

The full list of whitelisted extensions is posted in our FAQ.