Convert XLSX to XLS
or click to upload
XLSX / XLSM / ODS
Save a modern Excel workbook in the older XLS format that legacy software expects. The conversion happens in your browser and your file is never uploaded.
- No watermarks
- Fast results
- 100 % in-browser
- Zero sign-up
How It Works
Use XLSX to XLS in three quick steps.
Upload your XLSX file
Drag and drop one or more spreadsheets or browse your device.
Convert to XLS
Your browser re-saves each workbook in the legacy format.
Download the XLS file
Save the workbook, or a ZIP when you converted several files.
What is an XLSX to XLS converter?
Some older accounting systems, importers and machines still only accept the Excel 97-2003 format. An XLSX to XLS converter re-saves a modern workbook in that legacy format so the older software can open it.
If you can, prefer XLSX or CSV. XLS is an old format with real size limits.
For legacy software
Use it when a system rejects XLSX but accepts XLS.
Size limits apply
The XLS format holds at most 65,536 rows and 256 columns per sheet. Bigger sheets are refused with a clear message.
All sheets kept
Every worksheet is converted, with its values and formulas.
Formatting may be simplified
Charts, images, macros and some styling are not preserved.
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Why Use Our XLSX to XLS Tool
Fast, free and simple, with nothing to install.
Fast Results
Convert XLSX to XLS in seconds. It is processed on your device, so there is no upload wait.
Private by Design
Your files never leave your browser. Nothing is uploaded to a server and nothing is stored.
Works Everywhere
Use it on desktop, tablet or phone. There is no software to install and no extension needed.
Completely Free
No account, no watermark and no limit on how many files you process.
Frequently Asked Questions
Common questions about XLSX to XLS.
Upload the .xlsx file, press Convert to XLS and download the .xls workbook.
XLS supports at most 65,536 rows and 256 columns per sheet. Larger sheets cannot be saved in this format.
Yes. Sheets, values and formulas are carried over, but charts, images and macros are not.
Some older systems and importers still require the Excel 97-2003 format.
No. It is converted locally in your browser.