CSVFileView is a free portable tool that lets you open CSV files and manage data without using Excel or Google Sheets on Windows 11/10.

If you've encountered a CSV file and you're unsure what they're for, the good news is they're pretty straightforward and easy-to-use with apps you already know.

Learn how to use a Microsoft 365 setting to choose whether to open files in the online or desktop app, giving you full control for each file.

Turn your computer on and go pour yourself a cup of coffee. When you return, the software and files you need to start the day will be open and ready to go.

If the How do you want to open this file keeps popping up in Windows 11/10, select the default app. If this does not work, use these fixes.