Difftastic

Judgement

What it is

Developer tool

What it does

A diff tool that parses files with tree-sitter and compares their syntax, so reformatting and moved code show as the real changes only.

Adopt it when

Line-based diffs are noisy for your reviews, for example after reindenting or wrapping code, and you can set it as Git's external diff.

Watch out

It is slower than line diffs on large files and cannot produce patches you can apply.

Ready for

Usable

Runs as

Command line

Built with

Rust and tree-sitter

How established

Established: started 7 years ago, latest release 0.72.0.

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-06 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: Difftastic → Rust → runs on a microchip

How compilers were built, back to punched paper tape

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