Meld

Name: Meld
Brand: Meld

Free visual diff and merge tool for comparing files, folders, and version-controlled projects.

softwareDevelopmentdiff toolmerge toolopen source

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Our Verdict

Best for

Developers who want a free, cross-platform visual diff and merge tool integrated with Git.

Skip if

You want official first-party macOS packaging or a more modern UI.

What is Meld?

Meld is a free, open-source visual diff and merge tool that compares two or three files side by side, highlighting changed lines and letting users merge differences with a click. It also compares entire folders, flagging which files were added, removed, or modified, and can drill down into subfolders to review nested changes. Meld integrates with Git, Mercurial, Bazaar, and Subversion, and can be set as the diff and merge tool for 'git mergetool' or similar commands in other version-control systems. It runs on Linux natively, with official Windows installers and community-maintained macOS builds through Homebrew, MacPorts, or Fink.

SpecificationsAI-estimated

deploymentDesktop App

open source✅ Yes

api available❌ No

support optionsGNOME GitLab issues, documentation

key integrationsGit, Mercurial, Bazaar, Subversion

Key Features of Meld

Displays two or three files side by side with color-coded, line-level differences.

Supports three-way merges, showing a base version alongside two changed versions to resolve conflicts.

Compares entire folders and subfolders, flagging added, removed, or modified files at a glance.

Integrates with Git, Mercurial, Bazaar, and Subversion, and works as a 'git mergetool' backend.

Live-updates diffs as files change on disk, without needing to manually refresh.

Includes text filtering to ignore whitespace or specific patterns when comparing files.

Lets users navigate directly between changed hunks with keyboard shortcuts.

Translated into multiple languages for international developers.

Use Cases for Meld

Resolving Git merge conflicts

Set Meld as 'git mergetool' to visually resolve conflicting hunks during a merge or rebase.

Code review before committing

Diff local changes against the last commit to review edits before pushing.

Comparing two folder snapshots

Find which files changed between two exported project folders or backups.

Cross-branch comparison

Compare files across two branches to understand what a feature branch changed.

Pros & Cons of Meld

Pros

Completely free and open source under the GPL.
Handles both file diffs and whole-folder comparisons in one tool.
Deep version-control integration works well as a git mergetool replacement.
Actively maintained with a June 2026 stable release.

Cons

macOS builds are community-maintained rather than officially packaged by the GNOME project.
Interface looks utilitarian compared to some modern commercial diff tools.
Requires installing Python and GTK dependencies on some platforms.

Frequently Asked Questions

Is Meld free?

Yes, Meld is free and open source under the GPLv2-or-later license.

Does Meld work on macOS?

Yes, through community-maintained builds available via Homebrew, MacPorts, or Fink.

Can Meld be used as a git mergetool?

Yes, it can be configured as the diff and merge tool for Git and several other version-control systems.

Does Meld support comparing folders, not just files?

Yes, it can compare entire directory trees and drill down into individual file differences.

Pricing Overview

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Free

Meld

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