Add your XLSX file
Drop one or more .xlsx files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
XLSX to ODS
Converting a .xlsx file to .ods extracts the document's content from its office package into a portable form. Free, private, and validated — the file never leaves your browser.
100% private for supported formats
Runs on your deviceConvert supported files
Drop XLSX files here
Batch files can each use a different output. Nothing uploads for local conversions.
Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.About converting Excel workbook to OpenDocument spreadsheet
Converting a .xlsx file to .ods extracts the document's content from its office package into a portable form. An .xlsx file is a modern Excel workbook — a ZIP archive of SpreadsheetML XML parts describing sheets, shared strings, styles, and formulas. It has been Excel's default save format since 2007 and the de facto interchange format for tabular business data.
An .ods file is an OpenDocument spreadsheet, the workbook format LibreOffice Calc saves by default. Like its .odt sibling it is XML in a ZIP, but its content.xml describes tables of typed cells rather than paragraphs of prose. For this route the practical draw is open ISO 26300 standard with several independent implementations and dual raw-plus-display cell values make reliable data extraction easier — balanced against excel reads and writes it, but pivot tables and advanced styling can degrade, which is worth knowing before you commit a large batch.
Why convert XLSX to ODS?
The practical trigger for this conversion is usually a mismatch: with .xlsx, date-as-serial-number storage causes subtle off-by-one and timezone bugs. Switching to .ods buys you open ISO 26300 standard with several independent implementations, which is why it is the better fit for native saves from LibreOffice and OpenOffice Calc. Because the conversion runs locally, trying it costs nothing but a few seconds of compute on your own machine.
XLSX vs ODS at a glance
| Aspect | Excel workbook (.xlsx) | OpenDocument spreadsheet (.ods) |
|---|---|---|
| Format type | Text-based — characters and structure, so there is no visual quality loss | Text-based — characters and structure, so there is no visual quality loss |
| How it stores data | xl/worksheets/sheetN.xml holds rows of typed cells; text cells usually point into xl/sharedStrings.xml to avoid repetition | cells carry both a typed raw value attribute (office:value) and a formatted display string, so extractors can choose machine or human output |
| Strongest at | the standard vehicle for exchanging spreadsheets between organizations | native saves from LibreOffice and OpenOffice Calc |
| Weak spot | date-as-serial-number storage causes subtle off-by-one and timezone bugs | excel reads and writes it, but pivot tables and advanced styling can degrade |
| Metadata | docProps/core.xml carries Dublin Core creator and date fields while docProps/app.xml records the generating application and company — both ride inside the ZIP | meta.xml records the creator, timestamps, and table and cell statistics alongside the document |
Pick ODS as the output
Select .ods in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if ODS is selectable, the route is real and validated.
Convert on your device
Press Convert. The package is unzipped in memory and its XML content parsed locally; nothing is uploaded.
Verify and download
Each result is signature-checked before the download unlocks, so a failed encode can never masquerade as a valid ODS file. Outputs keep the original filename with the .ods extension.
XLSX to ODS questions, answered
Will converting XLSX to ODS lose quality?
There is no visual quality to lose — xlsx is text-oriented and ods is text-oriented, so the question is structural fidelity. Text, ordering, and basic structure are preserved; complex layout, embedded objects, and styling beyond the target's model are simplified.
Is it private to convert XLSX files here?
Yes — the .xlsx file is processed inside your browser tab and never uploaded. The package is unzipped in memory and its XML content parsed locally; nothing is uploaded. Close the tab and the file is gone from memory.
Where will the ODS file work?
LibreOffice and OpenOffice treat .ods as native, Excel has supported it since Office 2007 SP2, and Google Sheets imports and exports it. Because the container is standard ZIP with XML inside, browser-side text extraction works the same way it does for .xlsx.
Will the ODS file be bigger or smaller than my XLSX?
It depends on the content: cells carry both a typed raw value attribute (office:value) and a formatted display string, so extractors can choose machine or human output. Convert one representative file first and compare before batch-processing a large set.
What happens to the metadata in my XLSX file?
In .xlsx, docProps/core.xml carries Dublin Core creator and date fields while docProps/app.xml records the generating application and company — both ride inside the ZIP. Re-encoding through the browser pipeline does not carry embedded metadata into the output, which doubles as a privacy scrub — check the exported file if you specifically need tags preserved.
Can I convert ODS back to XLSX?
Yes — the reverse route exists as a separate tool. Bear in mind that round-tripping .xlsx → .ods → .xlsx is not a perfect undo when any lossy step is involved; keep your original if fidelity matters.