More about XLS to XLSM (Spreadsheet converter)

Understanding the Difference Between XLS and XLSM

XLS and XLSM are both Microsoft Excel file formats, but they serve different purposes. XLS is the binary file format used by older versions of Excel (Excel 97–2003), while XLSM is a macro-enabled workbook format introduced with Excel 2007 and later. Converting from XLS to XLSM allows users to leverage the advanced capabilities of modern Excel versions while retaining or enhancing macro functionality.

Although XLS supports macros through VBA (Visual Basic for Applications), XLSM was specifically designed for macro-enabled files within the newer Office Open XML framework. This means that converting to XLSM provides better support for security, integration, and compatibility with contemporary Excel features.

What Is an XLS File?

XLS is a legacy Microsoft Excel file format that stores spreadsheet data in a proprietary binary format. It supports multiple sheets, formulas, charts, and VBA macros, but lacks compatibility with many of the newer Excel features introduced in recent years. While still usable in modern Excel versions, it has limitations in terms of scalability, security, and functionality.

What Is an XLSM File?

XLSM stands for Excel Macro-Enabled Workbook. It is part of the Office Open XML format and allows users to store macros alongside standard spreadsheet content. XLSM files are widely used for automating tasks, data entry, financial modeling, and other advanced spreadsheet functions. They provide greater flexibility and performance compared to older XLS files.

Why Convert XLS to XLSM?

Upgrading your file from XLS to XLSM can unlock a range of benefits:

• Enhanced Macro Support: XLSM is specifically designed to handle macros, ensuring better integration and fewer compatibility issues.
• Improved Security: XLSM allows for macro signature validation, reducing the risk of unauthorized code execution.
• Access to Modern Features: XLSM supports new Excel functions, formulas, and features not available in the XLS format.
• Better File Structure: Being XML-based, XLSM files are more resilient and easier to repair or audit compared to binary XLS files.
• Cross-Version Compatibility: XLSM is fully supported by Excel 2007 and later, making it suitable for modern business environments.

How to Convert XLS to XLSM

There are several ways to convert an XLS file into the XLSM format, each catering to different user needs and software setups:

Using Microsoft Excel

1. Open the XLS file in Microsoft Excel.
2. Go to the "File" tab and select "Save As."
3. Choose a destination folder for the new file.
4. In the "Save as type" dropdown, select "Excel Macro-Enabled Workbook (*.xlsm)."
5. Click "Save" to complete the conversion.

Using LibreOffice Calc

LibreOffice Calc can open and save Excel files, but macro support may be limited. If your XLS file contains macros, they might not be preserved correctly in XLSM format using LibreOffice.

1. Open the XLS file in LibreOffice Calc.
2. Go to "File" and select "Save As."
3. Choose "Microsoft Excel 2007–365 (*.xlsm)" from the file type dropdown.
4. Save the file and test macro functionality in Microsoft Excel afterward.

Using Online Conversion Tools

Online converters allow quick XLS to XLSM conversion without installing software. These tools are convenient for users on different platforms or devices. However, ensure the safety and confidentiality of your data when using such services, especially if the file contains sensitive macros or business logic.

Key Benefits of Using XLSM Format

Once your XLS file is converted to XLSM, you can take advantage of features not available in older formats:

• Automated Tasks: Use VBA macros to automate calculations, formatting, report generation, and more.
• Custom Forms and Controls: Enhance your Excel interface with buttons, dropdowns, and other controls powered by VBA.
• Interactive Dashboards: Build dynamic, interactive reports with features like slicers, pivot tables, and form controls.
• Scalable Data Management: XLSM handles larger datasets more efficiently compared to XLS files.

Things to Keep in Mind During Conversion

Before converting your file from XLS to XLSM, consider the following points to ensure smooth results:

• Check Macro Functionality: Test all macros after conversion to ensure they behave as expected.
• Enable Macros in Excel: XLSM files require macro settings to be enabled for full functionality. Adjust these in Excel’s Trust Center settings if needed.
• File Size: XLSM files may be slightly larger due to added XML structure and macro content.
• Backup: Always keep a backup of the original XLS file before conversion, especially if it contains critical data or scripts.

Conclusion

Converting XLS to XLSM is an effective way to modernize legacy spreadsheet files, take advantage of macro functionality, and ensure compatibility with modern Excel versions. Whether you’re updating old business models or preparing automated financial reports, the XLSM format provides the flexibility, security, and power needed for advanced spreadsheet operations.