Convert XLSX to ODS — Free Online Converter
Convert Excel Open XML Spreadsheet (.xlsx) to OpenDocument Spreadsheet (.ods) online for free. Fast, secure document conversion with no watermarks or registration.
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How to Convert
Upload your .xlsx 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 .ods file when it's ready.
About XLSX to ODS Conversion
XLSX is Microsoft's Office Open XML spreadsheet format (ISO/IEC 29500), the default format for Excel 2007 and later. ODS (OpenDocument Spreadsheet) is the ISO-standardized open spreadsheet format (ISO/IEC 26300) used natively by LibreOffice Calc, Apache OpenOffice, and supported by Google Sheets. Converting XLSX to ODS moves spreadsheet data from one ISO standard to another, trading Microsoft ecosystem optimization for broader open-source compatibility and vendor independence.
Both formats store data as ZIP-compressed XML, but they use different XML schemas, formula syntax, and feature encodings. The conversion maps XLSX's SpreadsheetML elements to ODS's OpenDocument equivalents, preserving cell values, formulas, formatting, and sheet structure while producing a file optimized for open-source spreadsheet applications.
Why Convert XLSX to ODS?
Organizations using LibreOffice as their primary office suite get the best editing experience with ODS files. While LibreOffice can open XLSX, some features — particularly complex conditional formatting, data validation, and chart animations — render more accurately in the native ODS format. Converting XLSX to ODS before editing in LibreOffice avoids compatibility layers and produces more reliable results.
Government agencies and public institutions in many countries (Germany, France, Brazil, India, South Africa) mandate ODS for official document exchange as part of open standards policies. When XLSX spreadsheets must be submitted to these organizations, converting to ODS is a compliance requirement, not a preference.
Common Use Cases
- Prepare XLSX files for editing in LibreOffice Calc with optimal compatibility
- Submit spreadsheet data to government agencies requiring ODF-compliant formats
- Migrate corporate XLSX archives to vendor-neutral open document formats
- Share Excel spreadsheets with teams standardized on LibreOffice
- Convert XLSX templates to ODS for distribution in open-source environments
How It Works
The conversion engine uses LibreOffice in headless mode to parse the XLSX SpreadsheetML package and re-serialize it as an ODS package conforming to ODF 1.2. Excel formulas are translated to OpenDocument formula syntax (OASIS Open Formula standard). Cell styles, number formats, conditional formatting, data validation rules, and chart objects are mapped to their ODF equivalents. Sheet protection settings are preserved.
Quality & Performance
Cell values and standard formulas convert accurately. Basic formatting (fonts, borders, colors, number formats) transfers well. Excel-specific features like Power Query connections, dynamic arrays (FILTER, SORT, UNIQUE), and icon-set conditional formatting may not have direct ODS equivalents and will be simplified or omitted. Pivot tables convert but may need cache refreshing in LibreOffice.
Device Compatibility
| Device | XLSX | ODS |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Tips for Best Results
- 1Test formulas that use newer Excel functions like XLOOKUP — they may not have ODS equivalents yet
- 2Refresh pivot table caches after opening the converted file in LibreOffice
- 3Remove Power Query connections before converting — they are Excel-only features
- 4Verify conditional formatting rules in LibreOffice, especially icon sets and data bars
- 5Keep the original XLSX as a backup in case roundtrip conversion is needed later
Related Conversions
XLSX to ODS conversion bridges the Microsoft and open-source spreadsheet ecosystems, producing files optimized for LibreOffice and compliant with international open document standards.