Convert XLS to XLSM Online
XLS files are the legacy binary Excel spreadsheet format. Converting to XLSM gives you XLSM workflows.
How to convert XLS to XLSM
- Upload your XLS file. Drag it onto the box above or click to browse. Files up to 200 MB are accepted.
- Choose XLSM 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 XLS to XLSM?
People convert XLS to XLSM mainly for compatibility. Superseded by XLSX. XLSM, by contrast, is built for XLSM workflows, and support for XLSM depends on the application you use.
XLS vs XLSM: key differences
| XLS | XLSM | |
|---|---|---|
| File type | legacy | file format |
| Typical use | legacy spreadsheets | XLSM workflows |
| Compatibility | Superseded by XLSX. | Support for XLSM depends on the application you use. |
Tips for a clean XLS to XLSM conversion
- Superseded by XLSX.
- Use the highest-quality source XLS 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 XLS until you have checked the converted XLSM opens the way you expect.
Frequently asked questions
How do I convert XLS to XLSM?
Upload your XLS file to the converter on this page, make sure XLSM is selected as the output format and click “Convert now”. When the conversion finishes the download starts automatically.
Is this XLS to XLSM 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 XLS to XLSM reduce quality?
XLSM uses its own compression, so the converted file is re-encoded. Quality loss is minimal at sensible settings, but keep the original XLS if you may need to convert again later.
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.
What is a XLSM file?
XLSM is a XLSM file, handled by the converthubor conversion engine. Its technical name is XLSM and it is typically used for XLSM workflows.
Can I convert XLS to XLSM 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.