Spreadsheets

.XLSX Files

Excel Spreadsheet - XLSX is Microsoft Excel's modern spreadsheet format, using XML-based storage for better reliability and smaller file sizes.

What is a .XLSX file?

XLSX is Microsoft Excel's modern spreadsheet format, using XML-based storage for better reliability and smaller file sizes. It's the standard for business data, financial analysis, and data processing worldwide.

Technical Details

MIME Type

application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

Full Name

Office Open XML Spreadsheet

Developed

2007 (Microsoft)

Typical Uses

  • Business data
  • Financial analysis
  • Data processing
  • Reporting

Programs That Open .XLSX Files

Microsoft Excel

Cross-platform

Google Sheets

Web

Numbers

macOS/iOS

LibreOffice Calc

Cross-platform

How Moniker Renames .XLSX Files

Moniker analyzes Excel worksheets, headers, and data patterns to understand spreadsheet purpose, generating descriptive names that make data files easy to find.

Example Transformation

Before

data_export.xlsx

After

q4-sales-report-regional.xlsx

Related File Types

.CSV

CSV File

.ODS

OpenDocument Spreadsheet

Ready to organize your .XLSX files?

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