Boomkey

Type freely. Boomkey fixes it.

Typed in the wrong keyboard layout? Boomkey converts the text back on your Mac: hit space, or select it and double-tap Shift.

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Two ways to fix the wrong layout

Space, or a double-tap hotkey.

SpaceAuto on space
руддщhello

Hit space and the wrong-layout word fixes itself.

Beta · English ↔ Ukrainian, Belarusian, Hebrew, Russian

⇧+⇧Shift + Shift
ghbdsnпривіт

Select text and double-tap Shift to convert it instantly.

Features

Keyboard layout tools for everyday typing

Auto-correction

Type a word and hit space. If it came out in the wrong layout, Boomkey rewrites it on the spot. Auto-correction is in beta and covers English ↔ Ukrainian, Belarusian, Hebrew, and Russian.

Hotkey & last word

Double-tap Shift, or set your own shortcut, to convert selected text between any two installed layouts: a word, a sentence, or a whole paragraph. Your clipboard is restored right after. Nothing selected? It fixes the last word you typed.

Language switch hotkey

Set your own shortcut to jump straight to your next keyboard layout, no reaching for the menu bar. Any combo works — even modifier-only ones macOS won’t let you set, like ⌘ Cmd + Shift. Unlike the correction hotkey, this one works with every input source installed on your Mac, IME and CJK included.

Per-app rules & exceptions

Turn Boomkey off or pin a layout in specific apps, and keep a list of words it should never touch. Pinning works with any installed layout or IME, CJK included. Terminals and code editors are off out of the box.

Languages & layouts

The hotkey converts between any pair of installed alphabetic layouts: Latin (English, German, French, Polish, Spanish and ~55 more), Cyrillic (Ukrainian, Belarusian, Serbian and others), Greek, Hebrew, Arabic, Georgian, Armenian, and Korean.

Full list of supported languages
Text is processed locally on your Mac.

Versions

Which version is right for you?

The version from this site is the full one: it fixes words as you type. The App Store version fixes selected text on demand — no setup, no permissions.

From this siteApp Store
Works invirtually every appapps that support macOS Services
Auto-fix as you type (on space)beta, English ↔ Ukrainian, Belarusian, Hebrew, Russian—
Fix selected text with a hotkeydouble-tap Shift, any layout pair⌘⇧7 or right-click → Services
Fix the last word before the cursor—
Convert clipboard text with a hotkey—
Per-app rules & word exceptions—
System permissionsAccessibilitynone
Free to try7-day trial20 fixes a day
One-time purchaselicense for 2 MacsPro unlock via Apple
Download FreeFull comparison in the FAQ

Changelog

What's new

v1.2.0StableOctober 7, 2026
  • New Settings look: a native sidebar, lighter cards and text that's easier to read in dark mode. The layout switch shortcut now comes first in Languages.
  • When Boomkey switches your layout, a small pill on screen shows which one is on. You can turn it off in Languages.
  • The menu bar popup shows how many words were fixed this week and roughly how much time that saved.
  • Onboarding got a clearer welcome screen and a smoother animation, and you can open it again from About - Show Setup Guide.
  • Boomkey shows up in the Dock while Settings is open, so ⌘Tab can find it.
  • Double-shift no longer leaves a word highlighted or changes the word next to your selection, and tells you when a word is in your exceptions.
  • Fixed corrections in Google Docs, a word sometimes getting typed twice, and the Activate button not opening the license tab.
  • On macOS 27, permission instructions use the new "Device Control and Data Access" name.
All release notes