XLS to XLSX Converter

Convert XLS to XLSX online quickly and easily. Just upload your file, convert it, and download the XLSX in seconds.

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What is XLS ?

XLS is a file format used by Microsoft Excel to store spreadsheet data. It allows users to organize, analyze, and visualize data in tabular form, making it a versatile tool for various data management tasks.

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What is XLSX ?

The XLSX file format is a spreadsheet file format created by Microsoft Excel, which is part of the Microsoft Office suite. It is based on the Open XML format and is widely used for storing and managing data in tabular form, allowing users to perform calculations, create charts, and analyze information efficiently.

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How to Convert XLS to XLSX in Just a Few Steps

  1. Upload your XLS file
    Click the upload button or drag & drop your file into the converter area. We support all major formats.
  2. Choose XLSX as the output format
    The tool will automatically convert your file to XLSX.
  3. Start the conversion
    Click the "Convert" button and let our tool handle everything. The conversion only takes a few seconds.
  4. Download your converted file
    Once complete, download your new XLSX file instantly.

Start converting XLS to XLSX now — it’s fast, safe, and completely online!