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Spreadsheet Conversion

Convert SXC to XLSX Online — Free

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How to Convert

1

Upload your .sxc file by dragging it into the upload area or clicking to browse.

2

Choose your output settings. The default settings work great for most files.

3

Click Convert and download your .xlsx file when it's ready.

What is SXC?

SXC is the legacy spreadsheet format from StarOffice and early OpenOffice.org (pre-2.0). It stores spreadsheet data as XML inside a ZIP archive and was the predecessor to the ODF/ODS standard.

Format Details

Full Name
StarOffice Calc Spreadsheet
Extension
.sxc

Key Features

  • Legacy StarOffice
  • XML-based
  • ZIP archive
  • Predecessor to ODS

What is XLSX?

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

Format Details

Full Name
Microsoft Excel Spreadsheet
Extension
.xlsx

Key Features

  • Spreadsheet
  • Formulas
  • Charts
  • Data analysis

SXC vs XLSX

FeatureSXCXLSX
Full NameStarOffice Calc SpreadsheetMicrosoft Excel Spreadsheet
Extension.sxc.xlsx
Best ForLegacy StarOfficeSpreadsheet

Frequently Asked Questions

Yes. You can convert up to 5 files per day completely free, with no watermark or registration required. Pro users get unlimited conversions and larger file sizes.
Most files convert in under 30 seconds. Larger files may take 1-3 minutes. Processing runs on our servers, so your device stays fast.
Our converter uses optimized settings to preserve quality. Default settings prioritize quality over file size. You can adjust settings for more control.
Free users can convert files up to 100MB. Pro users can convert files up to 2GB with priority processing.
Yes. Our converter is browser-based and works on any device — iPhone, Android, tablet, or desktop. No app or software installation needed.

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