Active File Compare is a sophisticated tool designed for visually comparing and synchronizing text files, presenting the comparison results in dual side-by-side windows, where differences are highlighted with distinct color icons. This utility is particularly beneficial for analyzing variations in source code versions, enabling users to rectify code discrepancies, and it offers syntax highlighting for a variety of programming languages such as C++, C#, Java, Visual Basic, Delphi, Object Pascal, SQL, Perl, Assembler, Fortran, and Foxpro, as well as for file types like HTML, PHP, XML, INI, and BAT. Additionally, it proves useful in collaborative environments where multiple authors make alterations, facilitating effective source code management. The comparison algorithm is meticulously designed to ensure precise detection of differences, whether in smaller text files or in those with extensive modifications. Furthermore, Active File Compare includes its own dual-pane file manager, streamlining the editing process and enhancing productivity. This comprehensive functionality makes it a valuable asset for developers and anyone working with text files.