Diffex can compare 2 excel files and display differences. Diffex can launch 2 external diff tools. It's convenience for TortoisSVN and so on. Diffex can compare each rows only for now. It can support command line.

How to install:
1. Extract zip file.
2. Launch setup.exe and installing.
3. Launch Diffex from Start Menu.

Comparing
1. Set(D&D available) & Open 2 files by Open button.
2. Push [Compare] button and wait for a while.
4. Results are displaying in listview bottom of the window.
5. Select result(s) then markers are displayed on diff cells.

Please Note: Diffex can compare large file but it may take a long time. You can cancel comparing by pressing "ESC" key.

Requirements:
1. Microsoft .NET Framework
2. Excel 2003 and above

The license of this software is Freeware, you can free download and free use this microsoft office add-ins software.