Side by Side Differ is a dual-pane file and directory comparison tool for Linux built on Python's difflib and filecmp engines. Inspect line and character-level differences side by side, merge selected hunks in either direction, audit entire folder trees, and export clean patches or HTML diff reports.

Key Features:

• Dual-Pane Line and Character Diff: Highlights added (green), removed (red), and modified (amber) lines with inline character-level change spans, synchronized scrollbars, hunk navigation, and bidirectional Left-to-Right / Right-to-Left hunk merging with file saving.
• Recursive Folder Compare: Compares two directory trees recursively using byte content verification, displaying identical, modified (size and mtime deltas), left-only, and right-only entries in a filterable tree table.
• Unified Patch and HTML Diff Exporter: Generates git-apply-ready unified .patch files (difflib.unified_diff) and self-contained side-by-side .html diff reports (difflib.HtmlDiff).

Disclaimer: Side by Side Differ is an independent open-source project by TC Studio and is not affiliated with, endorsed by, or sponsored by Meld.