ExcelDiff analyzes multiple Microsoft Excel(.csv, .xls, .xlsx, .xlsm, .xlsb) files and shows their differences graphically, even clarifies cell-level. Main features: Compares Microsoft Excel files and extracts differences. Cell-level differences are detectable. Results are intuitively shown, keeping the layout in the original file. Differences are easily viewable even when columns/rows are added. Multiple files are comparable under specified folder. Also comparable among different Sheets in the same file and different regions on the same Sheet. Preservable comparison criteria, making easier repeat operation.Colors, Fonts and mathematical queries are comparable. Other optional configurations are abundantly prepared such as capital/small characters, ignoring spaces. No destructions are given to original files.