Convert XLS to OTS Online — Free
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How to Convert
Upload your .xls file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .ots file when it's ready.
What is 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 While superseded by XLSX, it's still widely found in enterprise data exports and archived files.
Format Details
- Full Name
- Microsoft Excel 97-2003
- Extension
- .xls
Key Features
- Legacy support
- Wide compatibility
- Spreadsheet
- Data analysis
What is 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.
Format Details
- Full Name
- OpenDocument Spreadsheet Template
- Extension
- .ots
Key Features
- OpenDocument
- Spreadsheet template
- LibreOffice Calc
- ISO standard
XLS vs OTS
| Feature | XLS | OTS |
|---|---|---|
| Full Name | Microsoft Excel 97-2003 | OpenDocument Spreadsheet Template |
| Extension | .xls | .ots |
| Best For | Legacy support | OpenDocument |