a structural diff that understands syntax 🟥🟩
Alternatives To Difftastic
Project NameStarsDownloadsRepos Using ThisPackages Using ThisMost Recent CommitTotal ReleasesLatest ReleaseOpen IssuesLicenseLanguage
7 days ago43September 18, 2022123mitRust
a structural diff that understands syntax 🟥🟩
199 days ago21May 07, 202127apache-2.0Swift
💻 A fast and flexible O(n) difference algorithm framework for Swift collection.
Textdistance3,11614299 months ago25June 29, 20229mitPython
Compute distance between sequences. 30+ algorithms, pure python implementation, common interface, optional external libs usage.
263 years ago12October 22, 201818mitSwift
Swift Diff
205 years ago7September 30, 20178mitSwift
The fastest Diff and patch library in Swift. Includes UICollectionView/UITableView utils.
Nanomorph701225652 years ago33February 18, 202117mitJavaScript
🚅 - Hyper fast diffing algorithm for real DOM nodes
2 years ago4June 08, 202113apache-2.0Swift
💾 A library for backporting UITableView/UICollectionViewDiffableDataSource.
3 months ago22August 25, 202211epl-1.0Clojure
A library to diff and patch Clojure/ClojureScript data structures
Vim Diff Enhanced332
3 years agoVim script
Better Diff options for Vim
Diff Lcs263214,363323a year ago16December 23, 20215otherRuby
Generate difference sets between Ruby sequences.
Alternatives To Difftastic
Select To Compare

Alternative Project Comparisons

it's difftastic!
English manual Chinese manual crates.io codecov.io

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

For installation instructions, see Installation in the manual.

Basic Example

Screenshot of difftastic and JS

In this JavaScript example, we can see:

(1) Difftastic understands nesting. It highlights the matching { and }, but understands that foo() hasn't changed despite the leading whitespace.

(2) Difftastic understands which lines should be aligned. It's aligned bar(1) on the left with bar(2) on the right, even though the textual content isn't identical.

(3) Difftastic understands that line-wrapping isn't meaningful. "eric" is now on a new line, but it hasn't changed.

One Minute Demo


This one minute screencast demonstrates difftastic usage with both standalone files and git.


Difftastic supports over 30 programming languages, see the manual for the full list.

If a file has an unrecognised extension, difftastic uses a textual diff with word highlighting.

Known Issues

Performance. Difftastic scales relatively poorly on files with a large number of changes, and can use a lot of memory.

Display. Difftastic has a side-by-side display which usually works well, but can be confusing.

Robustness. Difftastic regularly has releases that fix crashes.


Patching. Difftastic output is intended for human consumption, and it does not generate patches that you can apply later. Use diff if you need a patch.

(Patch files are also line-oriented, which is too limited for difftastic. Difftastic might find additions and removals on the same line, and it tracks the relationship between line numbers in the old and new file.)

Merging. AST merging is a hard problem that difftastic does not address.


Isn't this basically --word-diff --ignore-all-space?

Word diffing can't do this.

Difftastic parses your code. It understands when whitespace matters, such as inside string literals or languages like Python. It understands that x-1 is three tokens in JS but one token in Lisp.

Can I use difftastic with git?

You can! The difftastic manual includes instructions for git usage. You can also use it with mercurial.

If you're a magit user, check out this blog post showing one way to use difftastic with magit.

Does difftastic integrate with my favourite tool?

Probably not. Difftastic is young. Consider writing a plugin for your favourite tool, and I will link it in the README!



Difftastic is open source under the MIT license, see LICENSE for more details.

This repository also includes tree-sitter parsers by other authors in the vendored_parsers/ directory. These are a mix of the MIT license and the Apache license. See vendored_parsers/*/LICENSE for more details.

Files in sample_files/ are also under the MIT license unless stated otherwise in their header.

Popular Diff Projects
Popular Algorithms Projects
Popular Text Processing Categories
Related Searches

Get A Weekly Email With Trending Projects For These Categories
No Spam. Unsubscribe easily at any time.