XLS to XLSX Converter
Upgrade legacy Excel 97-2003 (XLS) files to the modern XLSX format for better compatibility and features.
Better Compression
XLSX files are smaller due to ZIP compression technology.
More Rows
XLSX supports 1 million+ rows vs XLS's 65,536 row limit.
Enhanced Security
XLSX format has better security and corruption recovery.
Frequently Asked Questions
What is the difference between XLS and XLSX?
XLS is the older Excel format (Excel 97-2003) with a 65,536 row limit. XLSX is the modern XML-based format (Excel 2007+) with 1,048,576 rows, better compression, and improved security. Converting to XLSX is recommended for better compatibility.
Will macros be preserved when converting XLS to XLSX?
Yes, macros and VBA code are preserved during conversion. However, if your file contains macros, save it as .XLSM (macro-enabled) instead of .XLSX to ensure macros remain functional.