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Spreadsheet Conversion

Convert XLS to OTS Online — Free

Fast, free XLS to OTS converter. No registration required.

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Cómo convertir

1

Upload your .xls 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 .ots file when it's ready.

¿Qué es XLS?

XLS is the legacy Microsoft Excel format used before Office 2007. While superseded by XLSX, it's still widely found in enterprise data exports and archived files.

Detalles del formato

Nombre completo
Microsoft Excel 97-2003
Extensión
.xls

Características principales

  • Legacy support
  • Wide compatibility
  • Spreadsheet
  • Data analysis

¿Qué es OTS?

OTS is the OpenDocument Format spreadsheet template used by LibreOffice Calc, Apache OpenOffice, and other ODF-compatible applications. It stores cell formatting, formulas, and styles as reusable templates.

Detalles del formato

Nombre completo
OpenDocument Spreadsheet Template
Extensión
.ots

Características principales

  • OpenDocument
  • Spreadsheet template
  • LibreOffice Calc
  • ISO standard

XLS vs OTS

CaracterísticaXLSOTS
Nombre completoMicrosoft Excel 97-2003OpenDocument Spreadsheet Template
Extensión.xls.ots
Ideal paraLegacy supportOpenDocument

Preguntas frecuentes

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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