XLSX to XLS
Free online XLSX to XLS converter. Files are processed locally in your browser, never uploaded.
Click or drag file here
Supports files up to 100MB
About XLSX to XLS
Some older machines, industry software, and ERP systems only accept .xls files. Converting XLSX to XLS (BIFF8) makes your workbook openable there. The worksheet data is exported fully, but note XLS is limited to 65,536 rows and 256 columns—anything beyond that cannot be retained.
How to use
Converting XLSX to XLS with Fangge takes just three steps:
1. Click the upload area above and select the XLSX file from your device (or drag it onto the page);
2. Conversion starts automatically and happens entirely in your browser—your file is never uploaded;
3. When it finishes, click "Download File" to save the XLS file locally.
Why convert XLSX to XLS?
Interoperability: Excel, WPS, LibreOffice, and business systems favor different formats—conversion keeps your data moving through every step;
Right format for the job: XLSX keeps styles, formulas, and multiple sheets, while CSV is perfect for system integration;
Ready to deliver: spreadsheets to PDF lock the layout for formal reports and archives;
No software needed: works in your browser without Excel or LibreOffice.
XLSX to XLS FAQ
Is XLSX to XLS conversion free?
Yes. Fangge is completely free, requires no registration, and has no conversion limits or hidden fees.
Will the converted XLS file keep the original formatting?
Conversion focuses on extracting text content. Basic structures like headings and paragraphs are preserved where possible; images, complex tables, and multi-column layouts may be simplified.
Is my file uploaded to a server?
No. All conversion happens locally in your browser. Your file data never leaves your device, making the process private and secure.
Is there a file size limit?
Files up to 100MB are supported, which covers the vast majority of e-books and office documents.
How do I save the file when converting to PDF?
When the target format is PDF, a nicely formatted print page opens after conversion. Use your browser's "Print → Save as PDF" to save the file—the text stays selectable and CJK characters render perfectly.