You don't necessarily need Microsoft Excel to work with an .xlsx file Reviewed by Ryan Perian This article explains what XLSX files are, how to open them, and which programs are able to convert ...

Before you can import Excel data into Outlook using Microsoft 365, you must save that data to comma-separated (delimited) format or .csv. SEE: How to Quickly Import a .txt or .csv File Into ...

It used to be easy to analyze your Twitter data: you'd go to your settings and ask for a download, and there among all the files would be a CSV file full of your tweets and the associated metadata.