Compare ODS and XLSX spreadsheet formats. Covers compatibility, feature support, formula differences, macro handling, and migration strategies.
ConvertIntoMP4 Team·February 24, 2026·6 min read
Open Standard vs. Industry Standard
ODS (OpenDocument Spreadsheet) and XLSX (Office Open XML Spreadsheet) are both open, XML-based spreadsheet formats — but they come from very different worlds. ODS is part of the OpenDocument Format (ODF), an ISO/IEC 26300 international standard developed by OASIS and adopted by governments worldwide. XLSX is Microsoft's Office Open XML format, standardized as ISO/IEC 29500, and is the default format for Microsoft Excel.
In theory, both formats are open standards that anyone can implement. In practice, XLSX dominates the business world because Excel dominates the business world. ODS is the default in LibreOffice and is mandated by some government agencies that require open formats. Choosing between them depends on your audience, your software, and your requirements for interoperability.
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This is where the formats diverge most significantly. While basic formulas (SUM, AVERAGE, IF, VLOOKUP) work identically in both, advanced formulas have differences:
Formulas That Work in Both
SUM, AVERAGE, COUNT, MIN, MAX
IF, AND, OR, NOT
VLOOKUP, HLOOKUP, INDEX, MATCH
LEFT, RIGHT, MID, LEN, TRIM
DATE, TODAY, NOW, YEAR, MONTH, DAY
XLSX-Only Features (Not in ODS or Translated Differently)
XLOOKUP — Excel 365 dynamic lookup (no ODS equivalent)
LAMBDA — user-defined functions (Excel 365)
LET — variable assignment in formulas (Excel 365)
Dynamic arrays (SORT, FILTER, UNIQUE, SEQUENCE)
STOCKHISTORY, FIELDVALUE — connected data types
Power Query / Power Pivot integration
ODS-Specific Behaviors
Regular expressions in MATCH functions (enabled by default)
Different handling of empty cells in calculations
COM.MICROSOFT. prefix for some Excel compatibility functions
Date serial number starts at different epoch in some implementations
Important: When converting between formats, always verify formula results. A formula that works in Excel may produce a different result in LibreOffice — or vice versa — due to subtle calculation differences.
Macro and Automation Differences
The biggest compatibility barrier between ODS and XLSX is macros:
Feature
ODS (LibreOffice)
XLSX (Excel)
Language
LibreOffice Basic, Python, JavaScript
VBA (Visual Basic for Applications)
Recording
Supported
Supported
UI automation
LibreOffice API (UNO)
Excel Object Model
Cross-compatibility
Cannot run VBA (mostly)
Cannot run LO Basic
Add-ins
LibreOffice extensions
COM add-ins, VSTO
VBA macros do not work in ODS files. LibreOffice has partial VBA compatibility mode, but it is unreliable for anything beyond simple macros. If your workflow depends on Excel VBA macros, XLSX is the only viable option.
When to Use ODS
Government and Regulatory Compliance
Many government agencies mandate ODF formats for document exchange:
European Union institutions use ODF as a standard
UK Government Digital Service recommends ODF
Several US state governments mandate ODF for public records
NATO uses ODF for document interoperability
Open-Source Workflows
If your organization runs on LibreOffice (common in education, non-profits, and government), ODS is the native format with the best performance and feature support.
Long-Term Archival
As an ISO standard with multiple independent implementations, ODS is a safer bet for long-term document preservation. If Microsoft discontinued Excel (unlikely but possible), XLSX files would still be readable, but the tooling ecosystem would shrink. ODS has multiple independent implementations (LibreOffice, Google Sheets, Apache OpenOffice, Calligra) that ensure long-term access.
When to Use XLSX
Business Environments
If you share spreadsheets with clients, vendors, or colleagues who use Excel, XLSX is the pragmatic choice. Excel has roughly 80% market share in enterprise environments.
Advanced Features
Excel's feature set exceeds what ODS/LibreOffice offers in several areas:
Power Query (data import and transformation)
Power Pivot (data modeling and DAX)
Dynamic arrays (spill formulas)
Connected data types (stocks, geography)
Co-authoring in Microsoft 365
VBA Macros
Any workflow involving VBA macros requires XLSX. There is no practical migration path for complex VBA code to LibreOffice Basic.
VBA macros, dynamic arrays, Power Query, conditional formatting complexity
ODS
XLSX
LibreOffice Basic macros, regex in formulas, some conditional formats
Either
Either
Complex charts may render differently, pivot table configs may reset
Quality and Interoperability Tips
Test formulas after conversion. Open the converted file and spot-check cells with complex formulas. Pay special attention to date calculations, lookup functions, and array formulas.
Strip macros before converting. If you do not need macros in the output, remove them before conversion to avoid compatibility warnings and potential security concerns.
Use simple formatting. Complex conditional formatting, custom number formats, and embedded objects are the most fragile elements during conversion. Stick to basic formatting for files you know will be converted.
Consider CSV as an interchange format. If you only need to transfer data (not formatting, formulas, or charts), CSV is the most reliable path between any two spreadsheet applications.
XLSX is the practical choice for business environments where Excel is the standard. ODS is the right choice for government compliance, open-source workflows, and long-term archival. For cross-format workflows, keep formulas simple, avoid macros when possible, and always verify results after conversion. Both formats are technically capable — the deciding factor is your ecosystem and your audience.
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