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Convert XLS to XLSX

Convert XLS files to XLSX in your browser.

Drop files here

or paste them in. Whole folders work too.

  • Nothing is uploaded
  • Works offline
  • Free and open source

How to convert XLS to XLSX

  1. Choose your XLS files, or drop them anywhere on this page.

  2. Check that XLSX is selected, and change the settings if you need to.

  3. Select Convert, then save your XLSX files.

About XLS and XLSX

XLS

XLS is the Excel 97–2003 workbook format, still produced by some older systems.

XLSX

XLSX is Microsoft Excel’s workbook format, with multiple sheets, formatting and formulas.

Questions

How do I convert XLS to XLSX?
Choose your XLS files or drop them on this page, check that XLSX is selected, then select Convert and save the result. It works the same on a phone or a computer.
Is it safe to convert XLS to XLSX here?
Yes. The conversion runs in your browser, so your XLS files are never uploaded, stored or logged.
Can I convert several XLS files at once?
Yes. Add as many as you like and they convert together. Save each result on its own, or all of them as one ZIP.

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