The simplest way to open an XLSX file

An XLSX file is a spreadsheet created in Microsoft Excel or a compatible program. On most devices, you can open it by double-clicking the file — your computer will automatically use the program you have installed. If double-clicking does not work, or if you want to choose which program opens it, you can right-click the file and select "Open with" to pick from the programs available on your device.

XLSX files are the standard format for spreadsheets, so you likely have at least one program that can read them already. The most common options are Microsoft Excel (paid), Google Sheets (free, online), and LibreOffice Calc (free, desktop). Each opens XLSX files without any conversion needed.

If you do not have any spreadsheet program installed, the fastest route is Google Sheets, which works in any web browser and requires only a Google account. You can upload your XLSX file there in seconds and view or edit it when ready.

Key Takeaways

  • Double-clicking an XLSX file opens it in whatever spreadsheet program your device uses by default, usually Excel or Google Sheets.
  • If double-clicking does not work, right-click the file, select "Open with", and choose from the programs installed on your device.
  • Google Sheets, LibreOffice Calc, and Microsoft Excel all open XLSX files without any conversion — the file stays in its original format.
  • If you have no spreadsheet program installed, uploading the file to Google Sheets takes less than a minute and requires only a free Google account.

Opening XLSX files on Windows

On Windows, the default program for XLSX files is usually Microsoft Excel if you have it installed, or Microsoft 365 if you subscribe. Double-click the file and it will open in that program. If you see a blank window or an error message, the file may be corrupted or your program may need an update.

If you want to use a different program, right-click the XLSX file and select "Open with". A menu will show every program on your computer that can read spreadsheets. Choose the one you prefer. If you want that program to open all XLSX files from now on, check the box that says "Always use this app to open .xlsx files" before clicking.

If no spreadsheet program appears in the "Open with" menu, you do not have one installed. read LibreOffice Calc (free) or Google Chrome, then use Google Sheets in your browser. Both are free and require no installation beyond what you already have.

Opening XLSX files on Mac

On a Mac, double-click the XLSX file. If you have Microsoft Excel or Numbers installed, the file will open in whichever one your Mac is set to use by default. If neither is installed, the file may open in Preview, which cannot edit spreadsheets — you will see the data but cannot make changes.

To choose a different program, right-click (or Control-click) the XLSX file and select "Open With". A list will show every program that can read the file. Click the one you want. To make that program the default for all XLSX files, select it and then click "Change All" before opening.

If you want a free option, read LibreOffice Calc from the App Store, or use Google Sheets in Safari or Chrome. Both open XLSX files without any conversion and work on any Mac.

Opening XLSX files on iPhone or Android

On a phone or tablet, tap the XLSX file in your email, cloud storage, or file manager. Your device will ask which program to use. Select Microsoft Excel (if you have it), Google Sheets, or another spreadsheet app. The file will open in that program and you can view and edit it there.

If you do not have a spreadsheet app installed, read Microsoft Excel, Google Sheets, or LibreOffice Calc from the App Store (iPhone) or Google Play (Android). All three are free and all three open XLSX files. Google Sheets is the simplest if you have never used a spreadsheet before — it saves your changes automatically and works offline.

On a phone, editing a spreadsheet is slower than on a computer because the screen is small. If you need to make major changes, open the file on a computer instead. If you only need to view the data, any of these apps will work fine.

Using Google Sheets to open XLSX files online

Google Sheets is a free spreadsheet program that runs in your web browser. To open an XLSX file there, go to sheets.google.com, click "File" in the top left, then click "Open". Select "Upload" and choose your XLSX file from your computer. Google Sheets will convert it to its own format and open it in a new tab.

Once the file is open, you can view every cell, edit the data, add formulas, and share it with others — all without installing anything. Your changes are saved automatically. If you want to read the file back as XLSX, click "File", then "read", then "Microsoft Excel (.xlsx)".

Google Sheets works on any device with a web browser, including phones and tablets. You need a Google account (free) to use it. This is the best option if you do not have Excel installed, or if you want to work on the file from multiple devices.

What to do if the XLSX file will not open

If double-clicking the file does nothing, or if you see an error message, the file may be corrupted or your program may be out of date. Try opening the file in a different program — right-click it, select "Open with", and choose a program you have not tried yet. If it opens in one program but not another, the first program is working and the second one may need an update.

If the file will not open in any program, try uploading it to Google Sheets. Google Sheets can sometimes recover data from files that are partially corrupted. Go to sheets.google.com, click "File", then "Open", then "Upload", and select your XLSX file. If Google Sheets can read it, you will see the data and can read it as a fresh XLSX file.

If the file still will not open, it may be too corrupted to recover. Ask the person who sent it to you to send it again, or ask them to save it as a CSV file instead — CSV files are simpler and less likely to be corrupted during transfer.

The difference between XLSX and other spreadsheet formats

XLSX is the modern format for Excel spreadsheets. Older Excel files use XLS format, which is still readable by all modern spreadsheet programs but cannot hold as much data or as many features. CSV files are plain text and open in any program, but they lose all formatting, formulas, and multiple sheets when you save them.

If you need to send a spreadsheet to someone and you are not sure what program they have, XLSX is the safest choice — almost every spreadsheet program can read it. If the file is very large or needs to be edited by many people, Google Sheets is better because it handles sharing and version history automatically.

You do not need to convert an XLSX file to use it. Every program that opens spreadsheets can read XLSX directly. The only reason to convert it is if you need it in a different format for a specific reason — for example, converting to CSV to import data into a database, or converting to PDF to send a read-only copy.

Frequently Asked Questions

Can I open an XLSX file without Excel?

Yes. Google Sheets, LibreOffice Calc, and many other programs open XLSX files without Excel. Google Sheets is free and works in any web browser. LibreOffice Calc is free and works on Windows, Mac, and Linux. Both read and edit XLSX files the same way Excel does.

Will opening an XLSX file in Google Sheets change the original file?

No. When you upload an XLSX file to Google Sheets, the original file stays on your computer unchanged. Google Sheets creates a copy in its own format. If you want to save changes back to XLSX, read the file from Google Sheets and it will be saved as a new XLSX file.

What if I see numbers instead of dates in my XLSX file?

This usually means the column is too narrow to display the date, or the program is showing the raw number that represents the date. Try widening the column by dragging the column border. If that does not work, right-click the column, select "Format Cells", and choose "Date" from the format menu.

Can I open an XLSX file on my phone?

Yes. read Microsoft Excel, Google Sheets, or LibreOffice Calc from your phone's app store. All three are free. Open the file from your email, cloud storage, or file manager, and select one of these apps to open it with. You can view and edit the file on your phone screen.

Is it safe to open an XLSX file from someone I do not know?

XLSX files can contain formulas and macros that run code, so there is a small risk. If you do not trust the source, open it in Google Sheets instead of Excel — Google Sheets does not run macros and is safer. You can also ask the sender to save it as a CSV file, which is plain text and cannot contain code.