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pqrs-org/karabiner-elements

📈 Trending★ 22,141C++Audience · vibe coderComplexity · 2/5ActiveLicenseSetup · moderate

TLDR

A keyboard remapping tool for macOS that lets you reassign keys, swap modifiers, and create custom shortcuts by intercepting input at the system level.

Mindmap

mindmap
  root((repo))
    What it does
      Remap any key
      Create shortcuts
      Swap modifiers
    How it works
      Runs in background
      Intercepts input
      Transforms before OS
    Use cases
      Match typing habits
      Fix hardware limits
      Boost productivity
    Tech stack
      C++
      Xcode
      CMake
    Supported systems
      macOS 13-26
      Intel Macs
      Apple Silicon

Things people build with this

USE CASE 1

Remap Caps Lock to Escape or Control for faster coding and navigation.

USE CASE 2

Swap Command and Control keys to match muscle memory from another OS.

USE CASE 3

Create multi-key shortcuts that trigger sequences of actions with a single press.

USE CASE 4

Adapt your keyboard layout to work around broken or missing keys on your Mac.

Tech stack

C++XcodeCMakemacOS

Getting it running

Difficulty · moderate Time to first run · 30min

Requires Xcode and macOS system permissions to intercept keyboard input; building from source with CMake needed.

Public domain, use freely for any purpose with no restrictions or attribution required.

In plain English

Karabiner-Elements is a keyboard remapping tool for macOS. "Remapping" means reassigning what a key does when you press it, for example, changing the Caps Lock key to act as Escape, swapping modifier keys, or creating complex shortcuts where pressing one key triggers a sequence of actions. It is useful for anyone who wants their keyboard to work differently from its defaults, whether to match personal habits, recover from a hardware limitation, or build custom productivity shortcuts. The tool runs as a background application on your Mac, intercepting keyboard input at a low level and transforming it before the system sees it. This means it can remap any key, including special keys, function keys, and modifier keys like Command, Option, Control, and Shift. Karabiner-Elements supports macOS 13 (Ventura) through macOS 26 (Tahoe), on both Intel-based and Apple Silicon Macs. You install it by downloading from the official site or using a package manager called Homebrew. Once installed, you configure your remappings through its settings interface; detailed documentation is available on the project's official site. The tool is written in C++ and is released under a public domain license, meaning it is completely free to use. It is an actively maintained open-source project that accepts donations. Developers who want to build it from source need Xcode, CMake, and a couple of additional build tools, along with an Apple Developer code signing identity since the app runs background system services that macOS requires to be signed.

Copy-paste prompts

Prompt 1
How do I set up Karabiner-Elements to remap Caps Lock to Escape on my Mac?
Prompt 2
Show me how to create a custom shortcut in Karabiner-Elements that types a whole phrase when I press one key.
Prompt 3
I want to swap my Command and Control keys in Karabiner-Elements, what's the simplest way to do that?
Prompt 4
How do I build Karabiner-Elements from source on my Mac with Xcode and CMake?
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Generated 2026-05-18 · Model: sonnet-4-6 · Verify against the repo before relying on details.