Altova DiffDog

Altova DiffDog is a feature-rich Windows application designed to compare file and entire directories, in order to highlight differences and export these to file. It gives you the possibility to edit documents as well as to undo and redo your steps for any number of times.

It makes it possible to compare files using FTP and HTTP servers, and to customize a wide range of settings related to XML comparison (like entity resolution), among others.

The interface of the program is user-friendly, although the title bar of the opened documents has the old Windows XP style. You can open any two files to compare since there are many formats supported by Altova DiffDog, such as TXT, TIFF, WMA, WAV, XML, ZIP and XLS as well as database data and schemas. Alternatively, you can point out two directories tin order to compare all containing files.

The comparison is bi-directional and any changes are automatically highlighted by the tool. Besides comparing the text, you can compare the files as XML, binary or according to the file extension settings.

The comparison can even be made while directly editing contents. Moreover, you can insert and remove bookmarks, wrap the words, find and replace text, validate XML code, set hotkeys for all commands, pick different colors used to highlights, and so on.

There are two editions available for download: Professional and Enterprise. The Enterprise version has significantly more features, such as support for database comparison.

The program worked without error on Windows 10 in our tests, compared files quickly and remained light on system resources consumption. All aspects considered, Altova DiffDog comes bundled in a pretty straightforward interface with neatly organized options and strong tools to help you compare files. It's ideal for professionals that have to compare source code or changelogs, for examples.