Convert XLSX to XLS online, for free.
Simply upload your XLSX files and click the convert button. You can also batch convert XLSX to XLS format.
We use both open source and custom software to make sure our conversions are of the highest quality. In most cases, you can fine-tune conversion parameters using “Advanced Settings” (optional, look for the icon).
Our XLSX to XLS Converter is free and works on any web browser. We guarantee file security and privacy. Files are protected with 256-bit SSL encryption and automatically deleted after 2 hours.
FreeConvert.com can convert your XLSX files to these other formats:
Want to convert large files without a queue or Ads?