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XLS to XLSX

Convert XLS files to XLSX online in one click. Your data is kept, and formatting too when the target format supports it.

5 files per day per IP across all free tools. A subscription is required beyond that. Resets at 00:00 UTC.

Drop your file here

or

Up to 100 MB per file

Files uploaded for processing expire after 24 hours. Online drafts expire after the last save: 24 hours without an account, 48 hours with an account. Expired data is then deleted by automatic cleanup.

How to use XLS to XLSX

  1. 1

    Upload your file

    Drop your file or choose it from your device. Several files can be converted at once.

  2. 2

    Convert

    Choose the available settings, then select Convert if shown. Some conversions start automatically.

  3. 3

    Download

    Save the converted file, or the whole batch as a ZIP.

About XLS files

XLS is the binary spreadsheet format of Excel 97–2003. Converting it to XLSX makes files smaller and compatible with modern tools.

About XLSX files

XLSX is the Office Open XML spreadsheet format used by Excel since 2007.

Frequently asked questions

Is XLS to XLSX free?

5 files per day per IP across all free tools. A subscription is required beyond that. Resets at 00:00 UTC.

Is XLS to XLSX secure?

Transfers use TLS encryption. Files uploaded for processing expire after 24 hours. Online drafts expire after the last save: 24 hours without an account, 48 hours with an account. Expired data is then deleted by automatic cleanup.

Do I need to install anything?

No. XLS to XLSX works in any modern browser on Windows, macOS, Linux, iOS and Android.

How do I cancel?

You can cancel at any time from your dashboard in two clicks. You keep access until the end of the paid period.

Will the quality be preserved?

Yes. The conversion uses professional engines and keeps resolution, fonts and layout whenever the target format allows it.

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