Skip to main content
Free Online XLSX Converter

XLSX Converter

Convert Microsoft Excel Spreadsheet files to any format, or convert any file to XLSX. Free, fast, and secure.

or import from

Convert to XLSX

CSV to XLSX

.csv → .xlsx

XLS to XLSX

.xls → .xlsx

ODS to XLSX

.ods → .xlsx

Convert XLSX to Other Formats

XLSX to CSV

.xlsx → .csv

XLSX to XLS

.xlsx → .xls

XLSX to ODS

.xlsx → .ods

About Microsoft Excel Spreadsheet (XLSX)

XLSX is the modern Microsoft Excel format. It's the standard for spreadsheets containing data, formulas, charts, and pivot tables.

File Details

Extension
.xlsx
Category
spreadsheet
MIME Type
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

Key Features

  • Spreadsheet
  • Formulas
  • Charts
  • Data analysis

XLSX Converter FAQ

XLSX is the modern Microsoft Excel format. It's the standard for spreadsheets containing data, formulas, charts, and pivot tables.
Simply upload your XLSX file using the converter above, select your desired output format, and click Convert. Your file will be ready to download in seconds.
Yes! You can convert XLSX files for free, up to 100MB per file. Pro users can convert files up to 2GB with batch processing.
You can convert XLSX to CSV, XLS, ODS, and more. We support over 3 output formats for spreadsheet files.
Our converter uses advanced encoding to preserve maximum quality. For most conversions, you won't notice any quality loss. You can also adjust quality settings in Advanced Options.