A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hi Matt_Thomas,
Thanks for contacting us,
Unfortunately, there is no direct way to open local files on the web with the basic free Office 365 accounts. You will need to either upload your files to OneDrive or another cloud service, or install the Office desktop apps on your PC to edit them offline.
Let me know if this helps or if you need further assistance.
Regards, Sola
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