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 2007 and later versions. It is a part of the Office Open XML specification and utilizes XML and ZIP compression to reduce file sizes. The .xlsx format allows for the creation of complex spreadsheets containing data, formulas, charts, pivot tables, and various formatting options. It is more efficient and secure when compared to the older .xls format, and is widely utilized in business, education, and personal data management. |
| Technical details | Introduced in Excel 2007 as part of the Office Open XML (OOXML) standard, the `.xlsx` format represents a significant advancement from the older `.xls` format. It utilizes XML within a ZIP archive structure to enhance data readability and efficiently organize elements such as worksheets and shared strings. This format can handle extensive datasets, supporting up to 1,048,576 rows and 16,384 columns per sheet. Additionally, it includes advanced features like formulas, charts, pivot tables, and VBA macros. The use of shared XML files helps optimize file size. `.xlsx` promotes cross-platform interoperability, integrates security features such as digital signatures and encryption, and even offers a macro-enabled `.xlsm` |
| MIME type | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet |