FreeDiff is a free file difference viewer for Windows 95/98/ME - Windows 2000/NT/XP.
Use it to analyze the changes between two revisions of a file.

Note: FreeDiff is not an editor. The differences between files can be viewed but the files can not be modified.

FreeDiff can be used to locate the differences in program source code files, HTML documents, and any other ASCII-based text files. A color-coded side-by-side display of the comparison results makes it easy to understand the differences between the two files at a glance.

Other file types can also be compared if they are first saved in a text format. For example, MS Word documents and MS Excel spreadsheets can be saved in text format and compared. Two versions of the System Registry database can be exported from within RegEdit and then compared using FreeDiff.

Features:

Allows drag and drop of files onto FreeDiff for comparison

Auto-completes file specifications as they are typed in

Compares ASCII text files in a side-by-side format

Differences are shown with color highlighting

Differences down to the character-level are shown

Easy navigation from one difference to another

Search for text within the files

Bookmarks can be added to the comparison results

Ignore Space and Ignore Case comparison options supported

Files can be printed with the differences pointed out

Free of charge!