Understand AI-generated code.

In a world where we no longer write code, we spend a lot more time reviewing it. Reviewer is a delightful, smooth macOS app built precisely for that.

Download for macOS

For Apple silicon Macs, on macOS 26 or later. Free and open source.

Reviewer showing a side-by-side diff of uncommitted changes, with the changed files beside it

Comment, then hand it off

Leave a comment on any line, then assign it to an agent to pick up and fix.

A comment on a line of code, being assigned to a new Claude chat with its model picker open

Review diffs your way

Toggle between split and unified views. When a hunk isn't enough context, open the whole file.

A diff laid out side by side, with the old and new lines joined across the gutter

Work with Claude Code and Codex from the same interface

Use popular harnesses directly in Reviewer, or use skills to connect to any harness you have on your machine.

Picking the model for an agent chat, with Claude and Codex models side by side

Run your services in one click

Set up your local services once from a macOS widget and start them with a single click. Ruby, NPM, Docker or any other development service you use.

The Run panel, with local services running and the dev server's logs

Intuitive Git integration

Create new branches, and let Reviewer write the commit message from what actually changed.

The branch picker, with recent and local branches

Know what changed, and when

Filter the history by author, date or branch. Click any entry to see what changed and when, or open a single file's history to follow how it got to where it is.

The version control history, with its branch graph and filters

Follow a code symbol to its source

Language server protocol integration for TypeScript, Swift and Ruby. Hover a symbol for its signature and docs, or find every usage of it across the codebase.

Find symbol listing every usage of a class across the codebase

Terminal

A built-in terminal for ad hoc work, right next to the code.

Light and dark

Follows your Mac, or pick the appearance you prefer.

Themes

Shiki and Pierre themes to make the environment your own.

Native to the Mac

Built for Apple silicon macOS 26 and later.