File Converter

Excel to ODS converter Free, private, no upload.

Convert Excel files to ODS right in your browser. ODS is the native format of LibreOffice Calc and an open standard for long-term storage. Your files are never uploaded.

or drop files anywhere · paste with Ctrl/⌘ + V

How to convert Excel to ODS

  1. 1 Drop your Excel files onto the page, or click “Choose files”. You can add many at once, or a whole folder.
  2. 2 ODS is already selected as the output. Optionally open Options to adjust sheet.
  3. 3 Click Convert, then Save. Converting several files? Save them all as one ZIP.

About the formats

Excel · Microsoft Excel workbook

XLSX is the spreadsheet format of Microsoft Excel, also used by Google Sheets and Numbers.

ODS · OpenDocument spreadsheet

ODS is the open spreadsheet format used by LibreOffice and OpenOffice.

The conversion runs on your device using pdf.js, pdf-lib, pdfmake, mammoth and SheetJS. You can adjust: sheet.

Frequently asked questions

How do I convert Excel to ODS?

Drop your Excel files onto the page, or click “Choose files”. You can add many at once, or a whole folder. ODS is already selected as the output. Optionally open Options to adjust sheet. Click Convert, then Save. Converting several files? Save them all as one ZIP.

Are my files uploaded to a server?

No. The conversion runs entirely in your browser using WebAssembly. Your files never leave your device, so it is safe for private photos, contracts and business data. Once the page has loaded it even works offline.

Will converting Excel to ODS reduce quality?

No. Both Excel and ODS keep full quality, so the conversion is lossless.

Can I convert multiple Excel files to ODS at once?

Yes. Add as many Excel files as you like; they are converted in parallel on your device and you can download them all as a single ZIP.

Is it free? Are there limits?

It is free, with no sign-up, no watermark and no daily limits. Because nothing is uploaded there is no upload size limit either; the only limit is your device’s memory, which matters mostly for very large videos.

See everything the Excel converter and the ODS converter can do.