A lightweight, menu bar–based macOS grammar checker that lets you instantly correct grammar, spelling, and punctuation from anywhere in your workflow — no sign-up required, totally free.
Download from the Mac App Store.
I’m sharing this source so others can explore, learn from it, and hopefully gain useful insights.
Please note, however, this is not intended for rebranding or redistribution under a different name with minimal changes.
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| Fix with Apple Intelligence | Fix with OpenAI |
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| Dark mode support | Fix Grammar from the Services menu in any app |
- Clone the repository
git clone https://github.com/lancy98/GrammarFixAI.git cd GrammarFixAI - Open the project in Xcode
open GrammarFixAI.xcodeproj
- Update the app identifier for the project
- Also update the
keychain-access-groupsin theGrammarFixAI.entitlements - Now run the project
- Launch GrammarFixAI — it lives in your menu bar.
- Paste or type text, then click Fix for instant corrections.
- Use ⌥⌘0 or Services menu to correct selected text in any app.
- Enable Launch at Login in preferences if you want it always running.
- macOS 26.0 or later
- App size: ~2 MB
- Language support: English
- Price: Free
This project is licensed under a custom BSD-style license. See the LICENSE file for details.