┌─ FILE ANALYSIS ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── ┐
│ DEVELOPER : Microsoft
│ CATEGORY : Document
│ MIME TYPE : application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
│ MAGIC BYTES : 504B0304
└ ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── ┘
What is an XLSX file?
XLSX is the default spreadsheet format for Microsoft Excel since Office 2007. Like DOCX, it uses the Office Open XML (OOXML) standard, storing worksheets and data as compressed XML files inside a ZIP container. It supports up to 1 million rows per sheet.
How to open XLSX files
- Microsoft Excel (Windows, macOS, Web) — Full editing
- Google Sheets (Web) — Free, online editing
- LibreOffice Calc (Windows, macOS, Linux) — Free
- Apple Numbers (macOS, iOS) — Free
- OnlyOffice (Windows, macOS, Linux) — Free
Technical specifications
| Property | Value |
|---|---|
| Format | Office Open XML (OOXML) |
| Container | ZIP archive |
| Max Rows | 1,048,576 |
| Max Columns | 16,384 (XFD) |
| Standard | ISO/IEC 29500 |
| Macros | .xlsm extension for macro-enabled |
Programs that open XLSX files
- Microsoft Excel — Native editor
- Google Sheets — Free online editing
- LibreOffice Calc — Free office suite
- WPS Spreadsheets — Free alternative
- OnlyOffice — Open-source office
Common use cases
- Business analytics: Data analysis and reporting
- Financial modeling: Budgets, forecasts, P&L
- Data management: Inventory, contacts, tracking
- Scientific data: Research data organization