Convert XLSX to XLK

Understanding xlsx and xlk file formats

XLSX is the default file format for Microsoft Excel spreadsheets, introduced with Excel 2007. It is based on the Office Open XML standard and stores data, formulas, charts, and formatting in a compressed ZIP package containing XML files.

XLK is an Excel backup file format. When the 'Always create backup' option is enabled in Excel, the application creates an XLK file as a backup copy of your spreadsheet. XLK files are not meant for regular editing but serve as a recovery option in case the original file is lost or corrupted.

How to convert xlsx to xlk

Direct conversion from XLSX to XLK is not supported by most file converters, as XLK files are generated by Excel itself as backup copies. To create an XLK file from an XLSX spreadsheet, you need to use Microsoft Excel and enable the backup feature.

Step-by-step conversion using Microsoft Excel

1. Open your XLSX file in Microsoft Excel.
2. Click File → Save As and choose your desired location.
3. In the Save As dialog, click Tools (next to the Save button) and select General Options.
4. Check the box for Always create backup and click OK.
5. Save the file. Excel will create a backup file with the .xlk extension in the same folder.

Best software for xlsx to xlk conversion

The most reliable way to create an XLK backup file from an XLSX spreadsheet is by using Microsoft Excel itself. No third-party converters are recommended, as XLK is a proprietary backup format specific to Excel.

Summary

To convert XLSX to XLK, use Microsoft Excel's built-in backup feature. This ensures your backup file is compatible and reliable for recovery purposes.