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Differ is a visual diff tool published by peterfei, currently available at version 0.2.0, which stands as the sole released version of the software to date. The application is a modern desktop program designed for file comparison and merging, placing it within the file comparison and merge tool category of software utilities. Its core purpose is to help users identify differences between files and combine changes from multiple sources through a graphical interface. Among its key capabilities is a side-by-side diff view enhanced with syntax highlighting, which makes it easier to read and interpret changes within source code and other structured text. Differ also supports three-way merge operations with built-in conflict detection, a use case commonly encountered when reconciling changes made independently by multiple contributors or across separate branches of work. In addition to single-file comparison, the tool offers recursive directory comparison, enabling users to examine differences across entire folder structures rather than inspecting files one at a time. A distinguishing feature of the application is its syntax-aware diffing, implemented through AST-based syntax-aware hunk regrouping, which organizes detected changes according to the underlying structure of the code rather than relying solely on line-by-line textual differences. This approach is intended to produce more meaningful and intelligible diffs when working with programming languages. Typical use cases for Differ include reviewing code modifications, resolving merge conflicts during collaborative development, auditing changes between versions of documents or configuration files, and synchronizing the contents of directories. Because it is a desktop application, Differ is suited for local workflows where users need an interactive visual environment for comparison and merging tasks. With version 0.2.0 representing the first and only entry in its version history, Differ remains in an early stage of its release lifecycle while already offering a comprehensive set of comparison features.
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