Microsoft Office 2010, codenamed Office 14, is the successor of Microsoft Office 2007 (Microsoft Office 2007), a productivity suite for Microsoft Windows. Extended file compatibility, user interface updates, and a refined user experience are planned for Office 2010. It will be available for Windows XP SP3 (Windows XP), Windows Vista, and Windows 7. With the introduction of Office 2010 a 64-bit version of Office will be available for the first time, although in 64-bit, only for Windows Vista and later client operating systems. Office 2010 is not supported on Windows XP Professional x64 Edition.

Office 2010 will mark the debut of free online versions of Word, Excel, PowerPoint, and OneNote, which will work in popular web browsers (Windows Internet Explorer, Mozilla Firefox, Google Chrome, and Apple Safari) but not in the Opera (Opera (web browser)) browser. Microsoft has confirmed that it will be released in the first half of 2010, and a public beta was made available in November 2009. A new edition of Office, Office Starter 2010, will replace the current low-end home productivity software, Microsoft Works.