Screenshot of Word Online, as of August 2014[update]
|Initial release||June 7, 2010|
|License||Proprietary software; both commercial and freeware variants are available|
Office Online (previously Office Web Apps) is an online office suite offered by Microsoft, which allows users to create and edit files using lightweight, web browser-based versions of Microsoft Office applications: Word, Excel, PowerPoint and OneNote. The offering also includes Outlook.com, People, Calendar and OneDrive, all of which are accessible from a unified app switcher. The on-premise version of this service called Office Web Apps Server can be installed in private clouds in conjunction with Microsoft SharePoint, Microsoft Exchange Server and Microsoft Lync Server.
Office Web Apps was first revealed on October 2008 at PDC 2008 in Los Angeles. Chris Capossela, senior vice president of Microsoft business division introduced Office Web Apps as lightweight versions of Word, Excel, PowerPoint and OneNote that allow people to create, edit and collaborate on Office documents through a web browser. According to Capossela, Office Web Apps was to become available as a part of Office Live Workspace. Office Web Apps was announced to be powered by AJAX as well as Silverlight; however, the latter is optional and its availability will only "enhance the user experience, resulting in sharper images and improved rendering."  Microsoft's Business Division President Stephen Elop stated during PDC 2008 that "a technology preview of Office Web Apps would become available later in 2008". However, the Technical Preview of Office Web Apps was not released until 2009.
On July 13, 2009, Microsoft announced at its Worldwide Partners Conference 2009 in New Orleans that Microsoft Office 2010 reached its "Technical Preview" development milestone and features of Office Web Apps were demonstrated to the public for the first time. Additionally, Microsoft also announced that Office Web Apps will be available to users in three ways: via Windows Live for consumers (instead of the previously announced Office Live Workspace), or via Microsoft SharePoint or Microsoft Online Services for business users. However, Office 2010 beta testers were not given access to Office Web Apps at this date, and it was announced that it will be available for testers during August 2009. However, in August 2009, a Microsoft spokesperson stated that there has been a delay in the release of Office Web Apps Technical Preview and will not be available by the end of August.
Microsoft officially released the Technical Preview of Office Web Apps on September 17, 2009. Office Web Apps was made available to selected testers via its OneDrive (at the time Skydrive) service. The final version of Office Web Apps was made available to the public via Windows Live Office on June 7, 2010.
On October 22, 2012, Microsoft announced the release of new features including co-authoring, performance improvements and touch support.
In February 2014, Office Web Apps were re-branded Office Online and incorporated Calendar, OneDrive, Outlook.com, and People. Microsoft had previously attempted to unify its online services suite (including services such as Microsoft Passport, Hotmail, Messenger, and later SkyDrive) under a brand known as Windows Live (patterned off its Xbox Live offerings), first launched in 2005. However, with the impending launch of Windows 8 and its increased use of cloud services, Microsoft dropped the Windows Live brand to emphasize that these services would now be built directly into Windows and not merely be a "bolted on" add-on. Critics had also criticized the Windows Live brand for having no clear vision, as it was being applied to an increasingly broad array of sometimes unrelated services. At the same time, Windows Live Hotmail was re-launched as Outlook.com (sharing its name with the Microsoft Outlook personal information manager).
Office Online can open and edit documents, spreadsheets and presentations in Office Open XML formats on the web. Starting on July 2013, they can render PDF documents or convert them to Microsoft Word documents, although the formatting of the document may deviate from the original. Since November 2013, the apps have supported real-time co-authoring and autosave Word files.
Personal edition of Office Online is available to the general public free of charge through the Microsoft Office website, which superseded SkyDrive (now OneDrive) and Office Live Workspace. Enterprise-managed versions are available through Office 365 offering. In February 2013, the ability to view and edit files on SkyDrive without signing in was added. The service can also be installed privately in enterprise environments as a SharePoint app, or through Office Web Apps Server. Microsoft also offers other web applications in the Office suite, such as the Outlook Web App (formerly Outlook Web Access), Lync Web App (formerly Office Communicator Web Access), and Project Web App (formerly Project Web Access).
- Finley, Klint (8 June 2010). "Microsoft Rolls Out Office Web Apps". ReadWrite Enterprise. SAY Media. Retrieved 21 January 2013.
- "Introducing Office Web Apps Server". Office IT Pro Blog. Microsoft. Retrieved 20 February 2014.
- "Microsoft to Extend Office to the Browser". News Center. Los Angeles: Microsoft. 28 October 2008. Retrieved 21 January 2013.
- Perez, Sarah (10 November 2008). "Microsoft Office Web Applications: Your Burning Questions Answered". Channel 9. Microsoft. Retrieved 21 January 2013.
- Fried, Ina (28 October 2008). "Next version of Office heads to the browser". CNet News. CBS Interactive. Retrieved 21 January 2013.
- "Microsoft Office 2010 Hits Major Milestone and Enters Technical Preview". News Center. Microsoft. 13 July 2009. Retrieved 21 January 2013.
- Foley, Mary Jo (13 July 2009). "Microsoft Office Web Apps: No test build until August". ZDNet. CBS Interactive. Retrieved 21 January 2013.
- Mary Jo Foley: No Microsoft Office Web Apps test build in August, after all 28 August 2009
- "Microsoft Web Apps: Office Goes to the Web". News Center. Microsoft. 17 September 2009. Retrieved 21 January 2013.
- Shahine, Omar (2012-10-22). "Updated Office Web Apps on SkyDrive". Retrieved 2013-11-10.
- "What’s new in the Word Web App?". 2013-11-06. Retrieved 2013-11-10. "Where's the Save Button? There's no Save button because we're automatically saving your document (quote appears as a screenshot)."
- "Meet Office Online, Microsoft's slightly tweaked Office Web Apps replacement". PCWorld. Retrieved 20 February 2014.
- Stross, Randall (May 27, 2012). "Goodbye to Windows Live (and Whatever It Meant)". The New York Times (New York Times).
- "Cloud services for Windows 8 and Windows Phone: Windows Live, reimagined". Building Windows 8. Microsoft. Retrieved 20 February 2014.
- Jones, Chris (July 31, 2012). "Introducing Outlook.com - Modern Email for the Next Billion Mailboxes". Outlook Blog. Microsoft. Retrieved 2012-07-31.
- Zarzar, Dan (3 July 2013). "PDFs in the Word Web App". Office Web Apps blog. Microsoft. Retrieved 4 July 2013.
- "Office Online browser support". Microsoft. Retrieved 24 August 2014.
- Moore, Jason (8 June 2010). "Office is now live on SkyDrive!". Inside Windows Live. Microsoft. Retrieved 21 January 2013.
- Kenison, Roxanne (8 February 2013). "Sign-in no longer required to edit Office docs in SkyDrive". Office Web Apps blog. Microsoft. Retrieved 4 July 2013.
- "FAQs for Outlook Web App". Outlook Web App. Microsoft. Retrieved 21 January 2013.
- "Welcome to Microsoft Lync Web App". Microsoft Office website. Microsoft. Retrieved 21 January 2013.
- "Getting started with Project Web App". Project Server Help. Microsoft. Retrieved 21 January 2013.