Convert XLSX 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.
XLSX
Microsoft Excel — Excel's format storing sheets, formulas and charts as XML.
ODS
OpenDocument Spreadsheet — The open-standard spreadsheet format used by LibreOffice.
How to convert XLSX to ODS
- 1Upload your XLSX file
Click “Choose a file” or drag and drop your XLSX 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.
XLSX vs ODS
| XLSX | ODS | |
|---|---|---|
| Full name | Microsoft Excel | OpenDocument Spreadsheet |
| Type | Spreadsheet | Spreadsheet |
| Compression | Lossless | Lossless |
| Best for | data, calculations and shared spreadsheets | open-source spreadsheets |
Frequently asked questions
Does converting XLSX to ODS lose quality?
Converting XLSX 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 XLSX and ODS?
Microsoft Excel (XLSX) is lossless and best for data, calculations and shared spreadsheets. OpenDocument Spreadsheet (ODS) is lossless and best for open-source spreadsheets. Convert XLSX to ODS when you need a spreadsheet for open-source spreadsheets.
Is the XLSX to ODS converter free?
Yes — converting XLSX 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 XLSX 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 XLSX 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 XLSX 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 XLSX files to?
Besides ODS, you can convert XLSX to CSV, JSON, PDF, TSV, YAML and more — see the full list of XLSX conversions below.
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Last updated July 2026