How to convert XLS to ODS
1. Upload XLS
Select or drag and drop your XLS file into the converter.
2. Choose ODS
Select ODS as your output format. You can process multiple files at once.
3. Download
Click convert and download your new ODS file instantly.
Format Details
XLS
XLS is the legacy binary spreadsheet format used by Microsoft Excel from 1987 through the Office 2003 era, based on Microsoft's proprietary Binary Interchange File Format (BIFF). It stores worksheets, formulas, charts, and macros in a binary structure that requires Microsoft's format specification to parse correctly. XLS remains common in older enterprise systems and when compatibility with legacy versions of Excel is required.
ODS
ODS (OpenDocument Spreadsheet) is the open standard spreadsheet format developed by OASIS, used natively by LibreOffice Calc and Apache OpenOffice Calc. It stores spreadsheet data, formulas, charts, and formatting in XML compressed within a ZIP archive, ensuring transparency and long-term accessibility. ODS is a fully open, non-proprietary alternative to Microsoft Excel's XLS and XLSX formats and is supported by Google Sheets.
Frequently Asked Questions
How do I convert XLS to ODS?
Upload your XLS file on Convertek, select ODS as the output format, then click Convert. Your ODS file will be ready to download instantly.
Is the XLS to ODS converter free?
Yes. Converting XLS to ODS on Convertek is completely free with no watermarks. Fair upload limits apply (typically 30 MB per file).
Is my file kept after conversion?
No. Files are processed temporarily and not stored permanently. Converted downloads are available only in your browser session.
What is the difference between XLS and ODS?
XLS and ODS are different file formats with distinct use cases. Converting between them lets you use your file in software or workflows that require the ODS format.