What format are excel files generally saved in?

Commonly used Excel saving formats are: XLSX (XML, smaller, strong compatibility)

#Common saving formats for Excel files

XLSX

The default file format for Excel 2007 and later.
• Based on XML, small size and strong compatibility.
• Allows the use of more features such as pivot tables, charts and functions.

XLS

The default file format for Excel 2003 and earlier.
• Based on binary and larger in size.
• Low compatibility and does not support some functions of Excel 2007 and later versions.

Other formats

• CSV (Comma Separated Values): Text file format, only contains data, not formatting information.
• ODS (OpenDocument spreadsheet): Open document format, compatible with various spreadsheet software.
• PDF (Portable Document Format) : An electronic document format that can be printed or shared, but cannot be edited.
• HTML (Hypertext Markup Language) : Web page format, which can be viewed through the browser, but cannot be edited.

Considerations when choosing a saving format

• Compatibility: The file requires a compatible Excel version and platform.
• File size: XLSX files are smaller and suitable for large data sets.
• Feature support: XLSX files support more features such as pivot tables and charts.
• Usage: If the file needs to be shared or printed, you may need to select PDF or HTML format.

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