Convert XLS to ODS online in seconds — free, with no sign-up. ODS is lossless and ideal for open-source spreadsheets. Your files are encrypted and deleted automatically after 24 hours.
XLS
Microsoft Excel (legacy) — The older binary Excel format, superseded by XLSX.
ODS
OpenDocument Spreadsheet — The open-standard spreadsheet format used by LibreOffice.
How to convert XLS to ODS
- 1Upload your XLS file
Click “Choose a file” or drag and drop your XLS file onto the page — no sign-up or email needed.
- 2Convert to ODS
ODS is already selected as the output. Open Options to fine-tune quality if you like, then click Convert.
- 3Download your ODS file
Your ODS file is ready in seconds — click Download to save it. Files are automatically deleted after 24 hours.
XLS vs ODS
| XLS | ODS | |
|---|---|---|
| Full name | Microsoft Excel (legacy) | OpenDocument Spreadsheet |
| Type | Spreadsheet | Spreadsheet |
| Compression | Lossless | Lossless |
| Best for | legacy spreadsheets; converted to XLSX or CSV | open-source spreadsheets |
Frequently asked questions
Does converting XLS to ODS lose quality?
Converting XLS to ODS preserves your text, images and most formatting. Very complex elements — macros, live formulas or unusual fonts — may not carry over perfectly, but the content stays intact.
What's the difference between XLS and ODS?
Microsoft Excel (legacy) (XLS) is lossless and best for legacy spreadsheets; converted to XLSX or CSV. OpenDocument Spreadsheet (ODS) is lossless and best for open-source spreadsheets. Convert XLS to ODS when you need a spreadsheet for open-source spreadsheets.
Is the XLS to ODS converter free?
Yes — converting XLS to ODS is completely free. There's no watermark, no sign-up and no email required, and you can convert as many files as you like.
Are my XLS files private and secure?
Yes. Your uploads are encrypted in transit, processed privately, and automatically deleted within 24 hours. We never share, sell or look at your files.
Can I convert XLS to ODS on iPhone, Android, Mac or Windows?
Yes. The converter runs entirely in your browser, so it works on any device — iPhone, iPad, Android, Mac, Windows or Linux — with nothing to download or install.
How long does it take to convert XLS to ODS?
Most files convert in a few seconds. Larger files take a little longer, and your upload speed is usually the limiting factor. There's no queue and no waiting for an email.
What else can I convert XLS files to?
Besides ODS, you can convert XLS to CSV, PDF, XLSX and more — see the full list of XLS conversions below.
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Last updated July 2026