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Convert XLS to XLSX

Convert XLS files to XLSX without uploading them. No ads, no tracking, no sign-up.

or drop them anywhere on the page, or paste

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 adjust the settings if you like.
  3. Select Convert, then save your XLSX files. Nothing is uploaded.

About XLS and XLSX

XLS is the older Excel 97–2003 workbook format.

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, and the files never leave your device.
Is it safe to convert XLS to XLSX here?
Yes. The conversion runs in your browser, so your XLS files aren't uploaded to a server, and nothing is stored or logged.
Can I convert several XLS files at once?
Yes. Add as many as you like and they convert together; when there are several results you can save them all as one ZIP.

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