XLSX
An Office Open XML spreadsheet format used to store worksheets, formulas, tables, charts, styles, and other spreadsheet data.
General information
- Format name
- Office Open XML Spreadsheet
- Extension
.xlsx- MIME type
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet- Category
- document
- Data type
- Binary
- Developer
- Microsoft
Common uses
Spreadsheets
Financial models
Data tables
Reports
Budgets
Charts and calculations
Related formats
Technical resources
| Resource | Publisher | Link |
|---|---|---|
| ECMA-376 — Office Open XML File Formats | Ecma International | Open resource ↗ |
| Word, Excel, and PowerPoint Standards Support | Microsoft | Open resource ↗ |
| Media Types Registry | IANA | Open resource ↗ |
Record information
- Verified
- October 3, 2026
- Last updated
- October 3, 2026