.XLSX File Description

Spreadsheet format introduced with Microsoft Excel 2007 (part of Office 12); stores data in cells arranged in rows and columns; based on the Open XML format and includes ZIP compression for smaller file sizes.

Backwards compatible with Microsoft Office 2000, Office XP, and Office 2003 via component support.

Other Information For .XLSX File Extension

• Company:

  Microsoft Corporation.

• File Type:

  Microsoft Office Excel 2007 XML Workbook

• Identifying Characters (Hex):

  50 4B 03 04

• Identifying Characters (ASCII):

  PK