XLSX file format
| Extension | .xlsx |
| Category | documents |
| Programs | Microsoft Office LibreOffice Kingsoft Office Google Docs |
| Main program | Microsoft Office |
| Description | .xlsx (Microsoft Excel Open XML Spreadsheet) The .xlsx format is the default file format for spreadsheets created in Microsoft Excel, starting with Excel 007 and later versions. It's part of the Office Open XML specification and uses XML and ZIP compression for smaller file sizesThe .xlsx format supports complex spreadsheets with data, formulas, charts, pivot tables, and various formatting. It is more efficient and secure compared to the older .xls format and is widely used in business, education, and personal data organization. |
| Technical details | Introduced in Excel 2007 as part of the Office Open XML (OOXML) standard, the `.xlsx` format is a notable advancement from the `.xls` format. It employs XML within a ZIP archive structure for improved data readability and efficient organization of elements like worksheets and shared strings. This format supports extensive datasets, allowing up to 1,048,576 rows and 16,384 columns per sheet, and includes advanced features like formulas, charts, pivot tables, and VBA macros. The use of shared XML files optimizes file size. `.xlsx` enhances cross-platform interoperability, includes security features like digital signatures and encryption, and has a macro-enabled `.xlsm` variant. Its XML structure minimizes file corruption risks and aids in data recovery. Widely compatible with modern spreadsheet software and older Excel versions, `.xlsx` has significantly enhanced Excel workbook functionality and efficiency, making it a preferred format for contemporary spreadsheet tasks. |
| MIME type | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet |