Convert XLS to XLSX

Convert your XLS file to XLSX format online instantly.

XLS

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About XLS to XLSX Conversion

Convert XLS to XLSX online for free. XLS is the legacy spreadsheet format for Microsoft Excel, storing tabular data. By converting it to XLSX (which is XLSX is the default spreadsheet format for Microsoft Excel, storing data in tables, sheets, and formula grids.), you can achieve better compatibility, editability, and accessibility. Our converter runs 100% locally inside your web browser. No files are ever uploaded to any server, guaranteeing absolute data security and privacy.

How to convert XLS to XLSX online:

  1. Upload your file: Click the "Choose File" button or drag and drop your document into the upload area to start the XLS converter.
  2. Process automatically: Our secure online converter will process and convert your XLS file to XLSX format instantly.
  3. Download result: Once the conversion is complete, click "Download File" to save your high-quality converted XLSX file.

Frequently Asked Questions

Which application should I use to edit the converted XLSX file?

You can open and edit the converted XLSX file using corresponding office suite applications like Microsoft Word, Excel, or PowerPoint, allowing easy text and layout changes.

How do I edit data inside the original XLS file?

You can convert the XLS file to an editable format like XLSX using ConvertSharp, and then open the output file in your preferred text processor.

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