Office web apps supported file extensions list

Question

Is there any definitive list of file extension that opens in O365 web apps/Office online? E.g: docx, doc, ppt, pptx, xls, xlsx, ...

Update: I noticed that onenote and visio extension(.one, and .vsd) is also supported, is there any official list from Microsoft as I need to make a whitelist out of these extensions

Answer 1

Supported files for viewing:

• Word files: .doc, .dot, .dotx, .docx, .docm, .odt
• Powerpoint: .pot, .potm, .pps, .ppsm, .ppt, .pptm, .pptx, ppsx, .odp
• Excel .xls, .xlsx, .xlsm, .xlsb, .ods

Supported files for viewing, editing and annotating:

• Word: .docx, .docm, .odt
• Excel: .xlsx, .xlsm, .xlsb, .ods
• Powerpoint: .pptx, ppsx, .odp

Which File Types Are Supported by Office Online?