TypoFixer

TypoFixer is a lightweight macOS app that cleans up and corrects Czech text using your choice of AI provider (Google Gemini or OpenAI). It’s built with SwiftUI and designed for speed: paste → Command+Return → copy the fixed text.

Screenshots

Features

• Czech grammar, spelling, and style correction
• Google Gemini or OpenAI provider selection
• Secure API key storage via Keychain (per‑provider)
• Command+Return to fix instantly; Escape to return to input
• One‑click copy of the corrected output

Requirements

• macOS 14+ (tested) and Xcode 15+
• An API key for your chosen provider:
  • Google Gemini: https://aistudio.google.com/apikey
  • OpenAI: https://platform.openai.com/api-keys

Installation

1. Open TypoFixer.xcodeproj in Xcode.
2. Select the TypoFixer scheme and a My Mac destination.
3. Build and run.

Configuration

1. Launch the app, then open Settings (⌘, or via the app menu).
2. Choose your preferred provider (Google Gemini or OpenAI).
3. Paste the corresponding API key:
   • Gemini key is stored under gemini_api_key in Keychain.
   • OpenAI key is stored under openai_api_key in Keychain.

The app subscribes to provider and key changes, so you can switch providers seamlessly.

Usage

1. Paste or type text into the top editor.
2. Press ⌘⏎ (Command+Return) or click Fix.
3. Copy the corrected result from the bottom editor using the Copy button.

Tips:

• If your original text had no quotes but the model returns quoted text, TypoFixer removes the wrapping quotes automatically.
• Press Esc in the output editor to focus the input editor again.

How It Works

• Requests are built per provider with AIRequestBuilder and executed by AIService.
• Responses are parsed and cleaned in TextProcessor.
• Provider selection and API keys are persisted via UserDefaults and Keychain.

Testing

You can run the unit tests from Xcode (⌘U) or from the command line:

xcodebuild -scheme TypoFixer -destination 'platform=macOS' test

Privacy

• Your API keys are stored locally in macOS Keychain.
• Text you submit is sent only to the selected AI provider’s API endpoint.

Roadmap Ideas

• Additional providers/models
• Editable prompts
• History and favorites
• Menubar quick‑fix or services integration

License

MIT — see LICENSE.md for details.

Acknowledgements

Made by Jan Honza Cerny (honzacerny.com).