How It Works
Three steps. No copying. No pasting. No switching apps.
Select Text
Highlight any text in any application — Mail, Notes, Slack, Chrome, VS Code, or anywhere else you type.
Press Shortcut
Hit ⌘⇧G (or your custom shortcut). That’s it — one keystroke.
Text Corrected
Your text is instantly corrected and replaced. No copying, no pasting, no switching windows.
Before
After
Powerful Features, Zero Friction
WunderPen operates system-wide through the macOS Accessibility API. It reads selected text from any application, corrects it with AI, and replaces it in-place.
Works Everywhere
WunderPen works in any application — Mail, Notes, Pages, Slack, Chrome, VS Code, Terminal. No app-specific plugins needed.
System-wide via macOS Accessibility API
No browser extensions required
Works even in Terminal and code editors
Menu Bar App
Lives in your menu bar — always one click or shortcut away but never clutters your workspace. No dock icon, no floating windows.
Connection status at a glance
Quick access to all features
No dock icon clutter
Smart Text Replacement
Dual-strategy approach for maximum compatibility. Uses Accessibility API for direct text manipulation with clipboard-based fallback for apps like Chrome.
Original clipboard always preserved
Works in Electron apps too
Seamless and invisible
Visual Feedback
Native spinning cursor shows processing progress. HUD overlay and macOS notifications provide clear status for every operation.
Spinning cursor follows your mouse
Error details via native notifications
Never left wondering what happened
Custom Prompts
Create unlimited custom AI prompts for any text transformation. Translate, summarize, rewrite for specific audiences — anything you can describe.
Each prompt gets its own shortcut
AI-powered prompt generator
Unlimited custom transformations
Easy Setup
Guided setup walks you through AI provider selection and macOS permissions in under a minute. One-click toggle to start WunderPen automatically at login.
Native macOS integration
Guided accessibility permissions
Always ready when you are
Your AI, Your Choice
Full control over which AI powers your corrections. Switch anytime.
Five Writing Modes + Custom Prompts
Choose the right mode for every situation. Create unlimited custom prompts for any text transformation.
Custom Prompt
Result
Correct Grammar
Fixes spelling, grammar, and punctuation while preserving your original tone and meaning.
Improve Writing
Enhances clarity, flow, and impact while fixing errors. Makes good writing great.
Make Concise
Removes redundancy and tightens prose while keeping the full meaning intact.
Make Formal
Rewrites in a professional, business-appropriate tone for emails, reports, and documents.
Make Casual
Rewrites in a friendly, conversational tone for messages, social posts, and informal writing.
Custom Prompts
Create unlimited custom AI prompts for any text transformation. Each gets its own keyboard shortcut.
Your Text Stays Yours
WunderPen is built with privacy as a first-class priority. No server, no backend, no analytics, no telemetry, no user accounts.
No Analytics
Zero telemetry, tracking, or crash reporting. No Sentry, no Firebase, no Crashlytics.
No Server
No backend, no accounts, no data collection. WunderPen is a standalone app.
Local Processing
With Ollama, your text never leaves your Mac. All AI processing happens on-device.
Secure Storage
API keys stored in macOS Keychain — Apple's encrypted credential storage. Never in plain text.
Ready to Write Better?
Download WunderPen and start correcting text in seconds.
Questions? [email protected]