delta vs KDiff3

delta is a free, open-source pager for Git and related command-line output, including diffs, grep, ripgrep JSON, and blame. It can show diffs side by side with line numbers and automatic wrapping, and highlight edits within lines using a Levenshtein edit inference algorithm. Its syntax themes are the ones available with bat. Delta can be configured as Git’s pager and interactive diff filter, and its documentation covers zdiff3 for merge conflicts. It can highlight output from ripgrep, git grep, and grep; blame and diff hyperlinks can target GitHub, GitLab, SourceHut, and Codeberg. The manual also describes integrations with Magit, VS Code, tmux, and GNU Screen. Executables are offered for Linux glibc, Linux musl, macOS, and Windows, alongside package-manager installation instructions. Paging depends on less, for which the project recommends a reasonably recent version. The project includes the MIT License. The listed git-delta plan costs nothing.

KDiff3 is a free, open-source desktop app for comparing and merging files and folders on Linux, macOS, and Windows. It can compare two or three text files or folders, showing differences line by line and character by character. For merge work, it can combine changes automatically and includes an editor for resolving conflicts, including three-way merges. Folder comparison and Git integration are supported. KDiff3 handles Unicode, UTF-8, and other file encodings; users can highlight or hide whitespace and comment changes, and print differences. It also supports version-control keyword and history merging, with network transparency through KIO. Its listed license is GPL-2.0-or-later. The Free plan costs nothing, and there is no free trial. Linux installation options include Discover or another AppStream store, a distribution package manager, or Flathub. The app page links to a handbook, forum, and bug-reporting page. KDE describes itself as an international community building and distributing free, open-source software since 1996.