Convert XLSX to XLS Online
XLSX and XLS serve different purposes. Convert XLSX to XLS here when you need legacy spreadsheets.
How to convert XLSX to XLS
- Upload your XLSX file. Drag it onto the box above or click to browse. Files up to 200 MB are accepted.
- Choose XLS as the output. The target format is pre-selected on this page — just press “Convert now”.
- Download the result. Conversion runs on our own server and the download starts as soon as it is ready. Your files are deleted automatically.
Why convert XLSX to XLS?
Converting XLSX to XLS is usually about reach: XLS works well for legacy spreadsheets, while XLSX is more at home in data analysis, budgets, reporting.
XLSX vs XLS: key differences
| XLSX | XLS | |
|---|---|---|
| File type | editable | legacy |
| Typical use | data analysis, budgets, reporting | legacy spreadsheets |
| Compatibility | Supported by Excel, Google Sheets and LibreOffice. | Superseded by XLSX. |
Tips for a clean XLSX to XLS conversion
- Supported by Excel, Google Sheets and LibreOffice.
- Use the highest-quality source XLSX you have — converting a compressed file again cannot restore lost detail.
- If you only need a smaller file, try a lower resolution or bitrate instead of a different format.
- Keep the original XLSX until you have checked the converted XLS opens the way you expect.
Frequently asked questions
How do I convert XLSX to XLS?
Upload your XLSX file to the converter on this page, make sure XLS is selected as the output format and click “Convert now”. When the conversion finishes the download starts automatically.
Is this XLSX to XLS converter free?
Yes — it is completely free and needs no account. Files up to 200 MB are accepted, and heavy use is rate-limited so the service stays available for everyone.
Will converting XLSX to XLS reduce quality?
XLS uses its own compression, so the converted file is re-encoded. Quality loss is minimal at sensible settings, but keep the original XLSX if you may need to convert again later.
What is a XLSX file?
XLSX is the modern Excel workbook format. Its technical name is Office Open XML Spreadsheet and it is typically used for data analysis, budgets, reporting.
What is a XLS file?
XLS is the legacy binary Excel spreadsheet format. Its technical name is Microsoft Excel 97-2003 and it is typically used for legacy spreadsheets.
Can I convert XLSX to XLS on my phone?
Yes. The converter runs in the browser on Android, iOS, Windows, macOS and Linux — no app installation is required.
Are my files kept on the server?
No. Uploaded files and converted results are deleted automatically a short time after the conversion finishes.