Free XLSX to XLS Converter
Convert a modern Excel XLSX workbook into legacy XLS format without uploading it.
XLSX to XLS Converter
Enter a value to begin.
How to use this xlsx to xls converter
- Choose an XLSX workbook, inspect its worksheet names and dimensions, then download a locally written BIFF8 XLS file.
- Check the inputs and preview, then use the primary action.
- Download, copy or use the result shown by the tool.
How the result is calculated
The pinned workbook parser reads up to ten worksheets and 50000 populated-range cells, then writes a legacy BIFF8 workbook. Cached values and basic sheet structure are retained, while unsupported modern features, macros, rich formatting, charts and external links may be lost.
Read the current SheetJS workbook writing options before submitting.
All calculation and transformation work happens in this browser tab. No entered value is sent to an Noler Tools application server.
Important limitations
Results are provided for convenience and should be checked independently before an important decision. A format or checksum result never authenticates an identity, document, account, licence, vehicle or registration.
Frequently asked questions
Is this xlsx to xls converter free?
Yes. It is free to use and does not require an account.
Does Noler Tools save my input?
No. The input and result remain in temporary browser memory and are not uploaded or saved by this site.