Merge Xls To XlsB Online for Free. Free Online Xls To XlsB Merger. Merge Xls To Word, Excel, PPTX, PDF, JPG, HTML, ODS, SVG, XPS and more....NET Merger MERGE-XLS to XLSB Merger XLSX ODS HTML NUMBERS CSV...CSV XLSB Merge XLS to XLSB via Python High-speed Python library...