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Spreadsheet Conversion

Convert XLTX to SXC Online — Free

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How to Convert

1

Upload your .xltx 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 .sxc file when it's ready.

What is XLTX?

XLTX is the standard Microsoft Excel template format in Office Open XML. It stores cell formatting, conditional rules, charts, and formulas as reusable templates without macros.

Format Details

Full Name
Excel Template
Extension
.xltx

Key Features

  • OOXML format
  • Excel template
  • No macros
  • Standardized

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

XLTX vs SXC

FeatureXLTXSXC
Full NameExcel TemplateStarOffice Calc Spreadsheet
Extension.xltx.sxc
Best ForOOXML formatLegacy StarOffice

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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