TkDiff

TkDiff is a straightforward application that you can use to compare the content within two files. It supports plain text documents (TXT format) and the TCL type. The program can be handled by all types of users, no matter if they have some background with this kind of tools or not.

The app is wrapped in a regular interface with a plain layout, where you can select the two files for comparison via the file browser ("drag and drop" is unsupported).

Results are shown in a dual-pane window, where you can clearly observe the differences between the file contents in blue, since TkDiff supports syntax highlighting.

You can show line numbers, ignore white spaces, synchronize scrollbars, as well as go the first, last, previous or next difference, as well as write a merge file, or use a search function when dealing with large amounts of data.

TkDiff barely uses CPU and system memory, so it doesn't interfere with the runtime of other active processes. No error dialogs have been shown in our tests and the app did not hang or crash. There is also a help file available. Thanks to its intuitive layout and overall simplicity, first-time users should quickly get adapted to TkDiff's workspace.