macOS Only · Menu Bar

Control windows, with a keystroke.

ResizeKey is a macOS utility that lets you move and resize windows with just keyboard shortcuts. Stay focused without reaching for the trackpad.

Download for macOS GitHub

What is ResizeKey?

A simple window management tool for macOS. Move and resize the currently focused window quickly with just keyboard shortcuts. Lightweight menu bar app designed to keep your workflow uninterrupted.

Supported OS: macOS

Main Operations

Move: ⌘ + ⌥ + H/J/K/L

Resize: ⌥ + ^ / ⌥ + ⇧ + H/J/K/L

Features

🎯 Window Movement

Quick positioning with ⌘ + ⌥ + H/J/K/L

📐 Four-Edge Resize

Expand/shrink with ⌥ + ⇧ / ⌥ + ⌃ + H/J/K/L

⚙️ Configuration File

Customizable via settings file

~/.config/resize-key/settings.json

🧩 Always Available & Lightweight

Menu bar resident. Minimal UI to maintain focus

How to Use

Install

Download the app and drag it to your Applications folder.

Grant Permission

When prompted for accessibility permission, enable ResizeKey in "System Settings › Privacy & Security › Accessibility".

Check Shortcuts

Operation	Default Shortcut	Description
move_left	`⌘` + `⌥` + `H`	Move left
move_right	`⌘` + `⌥` + `L`	Move right
move_up	`⌘` + `⌥` + `K`	Move up
move_down	`⌘` + `⌥` + `J`	Move down
resize_left_to_left	`⌥` + `⇧` + `H`	Extend left edge to the left
resize_left_to_right	`⌥` + `⌃` + `L`	Shrink left edge to the right
resize_top_to_top	`⌥` + `⇧` + `K`	Extend top edge upward
resize_top_to_bottom	`⌥` + `⌃` + `J`	Shrink top edge downward
resize_right_to_left	`⌥` + `⌃` + `H`	Shrink right edge to the left
resize_right_to_right	`⌥` + `⇧` + `L`	Extend right edge to the right
resize_bottom_to_top	`⌥` + `⌃` + `K`	Shrink bottom edge upward
resize_bottom_to_bottom	`⌥` + `⇧` + `J`	Extend bottom edge downward

Default step size: Move 50px / Resize 100px

Edit Settings (Customize)

You can override shortcuts and step sizes by creating a user settings file.

Save location $XDG_CONFIG_HOME/resize-key/settings.json ~/.config/resize-key/settings.json:

Default

{
  "move_step": 50.0,
  "resize_step": 100.0,
  "bindings": [
    {
      "operation": "move_left",
      "key": "command+option+h"
    },
    {
      "operation": "move_right",
      "key": "command+option+l"
    },
    {
      "operation": "move_up",
      "key": "command+option+k"
    },
    {
      "operation": "move_down",
      "key": "command+option+j"
    },
    {
      "operation": "resize_left_to_left",
      "key": "option+shift+h"
    },
    {
      "operation": "resize_left_to_right",
      "key": "option+control+l"
    },
    {
      "operation": "resize_top_to_top",
      "key": "option+shift+k"
    },
    {
      "operation": "resize_top_to_bottom",
      "key": "option+control+j"
    },
    {
      "operation": "resize_right_to_left",
      "key": "option+control+h"
    },
    {
      "operation": "resize_right_to_right",
      "key": "option+shift+l"
    },
    {
      "operation": "resize_bottom_to_top",
      "key": "option+control+k"
    },
    {
      "operation": "resize_bottom_to_bottom",
      "key": "option+shift+j"
    }
  ]
}