XLS to XLSX File Converter

xls2xlsx is a Python library designed to convert older Microsoft Excel .xls files into the newer .xlsx format. It provides a simple API for file conversion, leveraging xlrd for reading .xls and openpyxl for writing .xlsx. The current version is 0.2.0. While stable, its development appears to be in maintenance mode since its last update in 2021, with no active releases or new features planned.