diff

WinMerge is an open source differencing and merging tool for Windows.

Beyond Compare is a multi-platform utility that combines directory compare and file compare functions in one package.

QNAP QuDedup Extract Tool helps restore deduplicated .qdff

Visual diff and merge tool

Freeware Visual File Comparison Tool

Excel file comparison tool

Diff/Patch Frontend

Advanced 2 and 3-way file comparison (diff), merging, and folder synchronization

See all the changes in your documents, locally and offline. Take your work to the next level.

Intelligent document comparison tool

Helix Visual Merge Tool (P4Merge) is a three-way merging and side-by-side file comparison tool. Use it to visualize your merges, obtain comprehensive file history, and compare a broad range of image files.

A visual diff tool with syntax-aware diffing, directory comparison, and three-way merge support

Difftastic is a structural diff tool that compares files based on their syntax.

A C\C++ library and command-line tools for Diff & Patch between binary files or directories(folder); cross-platform; runs fast; create small delta/differential; support large files and limit memory requires when diff & patch.

Diff Text Viewer

A syntax-highlighting pager for git, diff, and grep output

Compare folders, Git repos, archives, FTP servers, and more - side by side or up to 16 sources at once.

Fast, keyboard-driven folder & file comparison, migrate and sync tool

Deterministic pre-commit risk detection engine for git diffs.

A code review TUI with vim keybindings. Export to GitHub, GitLab, Bitbucket, or clipboard.

Cross-repository file synchronization through intelligent iterative merging

CLI search and replace

A Windows desktop diff tool for comparing git branches, with AI-powered code review and explanation.

GNU Diffutils is a package of several programs related to finding differences between files.

JSON diff and patch.

KDiff3 is a diff and merge program.