How do I convert XLS to ODS online for free?

Document Conversion

Convert XLS to ODS Online

Free online Excel Spreadsheet to OpenDocument Sheet converter. Files are processed locally in your browser — no uploads, 100% private.

.XLS

.ODS

Drop your .XLS file here

or click to browse from your device

Accepts .XLS files

100% Private

Files never leave your device

Instant

In-browser processing

No Account

No sign-up required

How to Convert XLS to ODS Online

1Upload your .XLS file using the drop zone above or click to browse
2Your file converts automatically to .ODS format entirely within your browser
3Download your converted file — no account or email needed

Frequently Asked Questions

Upload your Excel Spreadsheet file using the drop zone above. Your file is instantly converted to OpenDocument Sheet format right inside your browser using client-side processing — no account, no software, and no cost. When conversion is complete, click Download to save your ODS file.

Completely. Our converter runs 100% in your browser using local processing, so your XLS file never leaves your device or touches any external server. We do not store, access, or transmit your files at any point.

Desktop: up to 500 MB. Mobile: up to 200 MB. All processing happens locally in your browser — your files are never uploaded to any server.