Free XLS to ODS converter

Why convert XLS to ODS?

People convert XLS to ODS because XLS is Excel’s pre-2007 format, and current tools treat it as legacy baggage, while ODS is an open standard that LibreOffice and Google Sheets handle natively.

How to convert XLS to ODS

1. Choose your XLS file. Drop it on the box above, or tap to browse. You can pick several files at once.
2. Confirm the target is .ods. It is preselected when your browser can encode it; otherwise the closest available target is chosen. Adjust quality, size or the other options if you want to.
3. Convert and download. Press Convert, then Download. Your file stays on your device the whole time.

What is a .xls file?

XLS is the old binary Excel format, used from 1997 to 2003 and still produced by plenty of legacy systems and bank exports. Excel still opens one, but it caps out at 65,536 rows, which modern data regularly exceeds.

What is a .ods file?

ODS is the open spreadsheet standard used by LibreOffice and OpenOffice Calc. It holds the same sheets, formatting and formulas as XLSX, and Excel can open one, making it a good neutral choice when you do not want to require Microsoft Office.

What to expect from this conversion

Cell values are carried across exactly as they appear. Formulas become their calculated results, and formats that hold only one table — CSV and TSV — take the first sheet of a multi-sheet workbook. Only cell values cross over, not formulas or macros.

Is it private?

Yes, by design. Every conversion happens inside your own browser using your device’s processor — there is no server that receives your XLS file, so there is nothing for anyone to store, scan or leak. You can confirm it yourself: open your browser’s developer tools, watch the Network tab while you convert, and you will see no upload.

Questions about XLS to ODS

Is this XLS to ODS converter free?

Yes, completely. There is no account, no daily limit, no watermark and no premium tier.

Is my XLS file uploaded to a server?

No. The conversion runs inside your own browser using your device's processor. The file is read from your disk, converted in memory and saved back to your disk — nothing is transmitted, so there is nothing for anyone to store.

Can I convert XLS to ODS online without downloading software?

Yes. This is an online XLS to ODS converter that runs in your browser, so there is nothing to install and no app to trust with your files. It works the same on a phone.

What happens to the quality?

Cell values are carried across exactly as they appear. Formulas become their calculated results, and formats that hold only one table — CSV and TSV — take the first sheet of a multi-sheet workbook. Only cell values cross over, not formulas or macros.

Can I convert several XLS files at once?

Yes. Select as many files as you like and they are converted one after another in a single tap, with a download for each and a zip of all of them.

Should I keep the original XLS file?

Yes — keep it, converting never touches it. The reason to make a copy in another format is that XLS is Excel’s pre-2007 format, and current tools treat it as legacy baggage.

Related conversions

See all 399 conversions · Read the guides