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Upload the workbook, convert, download the ODS.
Select your .xls or .xlsx file — or drag it in.
Start the conversion in your browser.
Download the finished .ods.
Open it in LibreOffice Calc, OpenOffice or any ODF app.
Built for speed, privacy and reliability — on any device.
ODS is the ISO-standard spreadsheet format — free of licensing strings.
Legacy and modern Excel files convert the same way.
Processed in your browser and removed right after.
No account, no watermark, no limits.
Supports DOCX, XLSX, PPTX and legacy formats. Formatting and layout are retained as closely as possible.
Add the .xls or .xlsx file to the tool above and start the conversion — the .ods downloads in seconds, free.
ODS is required by many public-sector and academic workflows, opens identically in free office suites, and guarantees long-term readability without proprietary software.
Standard formulas carry over into Calc. A few Excel-only functions may map differently — spot-check calculated cells.
The file is processed in your browser and automatically deleted right after — usually within minutes, never shared, never stored.
Yes — the ODS to Excel tool converts the other way at any time.
Yes — completely free, no account, no watermark, no daily limits.
Convert Excel to ODS — open format, free