Convert ODS to XLSX Online Free — No Upload, Formatting Kept
Turn OpenDocument .ods spreadsheets into real Excel .xlsx workbooks right in your browser — formulas, dates and styles stay intact. No upload, no signup, no limits.
Drop .ods files here, or click to browse
Supports .ods (OpenDocument) · processed locally · never uploaded
How to Convert ODS to XLSX Online
- Drop one or more .ods files into the box above — files are processed locally and never uploaded.
- Click Convert to XLSX — every workbook is parsed and repacked in the Excel OOXML format.
- Check the report — each file lists the worksheets that were converted, by name.
- Download — a single file downloads directly; multiple files come back bundled as a ZIP.
Why Convert ODS to XLSX
The .ods format is the native format of LibreOffice Calc and OpenOffice, defined by the ISO-standard OpenDocument specification. It works beautifully in open-source ecosystems — but the reality of office life is that Excel still runs the show: corporate templates, add-ins, scripts and many web services expect .xlsx first.
Convert once, properly, and the friction disappears: the converted file behaves exactly like any workbook saved by Excel itself, with the same XML-inside-a-ZIP structure that modern tools parse fastest.
A spreadsheet that demands a password before opening is encrypted at file level. Encrypted .ods files cannot be converted without that password — no honest tool can read them.
ODS vs XLSX at a Glance
Under the hood the two formats are close cousins — both are XML packed into a ZIP — but their place in the ecosystem could hardly be more different.
| Aspect | .ods (OpenDocument) | .xlsx (Excel 2007+) |
|---|---|---|
| Internal structure | XML files in a ZIP archive | XML files in a ZIP archive |
| Governing standard | ISO/IEC 26300 (OpenDocument) | ECMA-376 / ISO/IEC 29500 (OOXML) |
| Formula language | OpenFormula (ODF formulas) | Excel formula syntax |
| Default application | LibreOffice Calc, OpenOffice | Microsoft Excel |
| Ecosystem support | Open-source suites, some web apps | Virtually all spreadsheet tools and services |
| Support status | Current ISO standard | Current default of Excel, Sheets and LibreOffice |
What the Conversion Preserves
The converter reads the OpenDocument XML of the source file and rebuilds it as OOXML, keeping the workbook structure intact.
- Cell values — text, numbers, booleans and error codes stay exactly as they were.
- Dates keep their value and display format, so they look identical in Excel.
- Formulas are translated to Excel syntax where a direct equivalent exists; the last calculated result is always kept.
- Multiple sheets keep their names and order, along with basics like column widths and merged cells.
Limitations
- Only .ods (OpenDocument Spreadsheet) is accepted — .fods (flat XML) and .ots (templates) are not supported.
- A few OpenFormula functions have no Excel equivalent; those cells keep their last calculated result as a static value.
- Encrypted .ods files (password required to open) cannot be converted.
- Only convert files you own or have permission to modify.
Frequently Asked Questions
Is this ODS to XLSX converter really free?
Yes — 100% free, with no sign-up, no watermark and no file limit. Everything runs in your browser.
Are my files uploaded to a server?
No. Parsing and repacking happen entirely in your browser with JavaScript; your file never leaves your device.
Will formulas survive the ODS to XLSX conversion?
Values always do. Formulas are translated from OpenFormula to Excel syntax where an equivalent exists; for the few without one, the last calculated result is kept as a static value.
Can Excel open ODS files directly?
Modern Excel can import .ods, but that importer is lossy for formatting and features. Converting to .xlsx once gives you a file every Excel version and tool handles natively.
Can it convert a password-protected ODS file?
If a password is required to open the file, no — that is genuine encryption. Mere cell or sheet protection without an open password does not block conversion.
Why convert ODS to XLSX at all?
Excel, corporate systems, add-ins and most web services expect XLSX. Converting removes import quirks and lets you use the other tools on this site on the result.
Can I convert several files at once?
Yes. Drop multiple .ods files and convert them in one pass; the results download together as a ZIP.
Will my spreadsheet look the same after conversion?
For typical sheets, yes — values, dates and layout carry over. Exotic OpenDocument features (rare chart types, form controls) have no Excel equivalent and may be simplified or dropped.
Related Tools
Need to view or edit the converted workbook afterwards?
Open the free online Excel editor