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Guide · TS Suite Prime

How to open an Excel file without Excel

Someone sent you an .xlsx and Office is not installed. You do not need to buy a license: here are the fastest ways to open it, edit it and save it back as Excel.

Option 1: open it in your browser with TS Sheets (no account)

  1. Open TS Sheets.
  2. Click Open or drop the .xlsx file onto the grid.
  3. Edit it like Excel: formulas, formatting, multiple sheets.
  4. Click Save .xlsx (or Ctrl+S) to download the edited file.

The file opens inside your browser and is never uploaded to any server, so it works for sensitive data such as payroll or customer lists.

Option 2: just view it

If you only need to read the data, the document viewer shows every sheet instantly. It is the quickest option on a phone.

Option 3: other free alternatives

  • Excel for the web: free with a Microsoft account; the file is uploaded to OneDrive.
  • Google Sheets: free with a Google account; the file is uploaded to Drive.
  • LibreOffice Calc: a free desktop program you install.

What is kept when you open an .xlsx?

KeptNot kept
Values, formulas, multiple sheets, bold, colors, borders, number formats, column widths, merged cells, frozen panesMacros (VBA), charts, pivot tables, advanced validation, comments

Old .xls file? TS Sheets opens .xlsx and .csv. If you have an Excel 97-2003 .xls, open it once in Google Sheets or LibreOffice and save it as .xlsx.

TS SheetsA spreadsheet with 400+ formulas. Opens and saves .xlsx and .csv.
Open TS Sheets →

Frequently asked questions

Can I open Excel on my phone without the app?

Yes. The document viewer and TS Sheets run in your phone browser, although editing is easier on a computer.

Are formulas lost?

No. Formulas are kept and recalculated.

Is it safe for files with personal data?

Yes. With TS Sheets the file never leaves your computer.

More guides

Basic spreadsheet formulas with examplesHow to make a monthly budget in a spreadsheetHow to open a Word (.docx) file without OfficeHow to open a PowerPoint without PowerPoint

Updated: October 2026.