WunderPen for Mac

WunderPen is an AI-powered writing correction tool for macOS that lives in your menu bar and works system-wide. Select any text in any application, press a keyboard shortcut, and your text is instantly corrected and replaced in place — no copying, no pasting, no switching apps.

Features

• Works in any application system-wide — Mail, Notes, Pages, Slack, Chrome, VS Code, Terminal, and more — via the macOS Accessibility API.
• Instant text correction and replacement with a single keyboard shortcut (⌘⇧G or custom).
• Five built-in writing modes: Correct Grammar, Improve Writing, Make Concise, Make Formal, and Make Casual.
• Custom AI prompts for unlimited text transformations — translate, summarize, rewrite for any audience — each with its own keyboard shortcut.
• Choice of AI provider: run fully on-device with Ollama (text never leaves your Mac) or connect your own OpenAI API key for cloud-based processing.
• Smart dual-strategy text replacement using Accessibility API with clipboard-based fallback for maximum app compatibility, including Electron apps.
• Menu bar app with no dock icon and no floating windows — always accessible but never cluttering your workspace.
• Visual feedback via native spinning cursor, HUD overlay, and macOS notifications so you always know the status of an operation.
• API keys stored securely in macOS Keychain — never in plain text.
• No analytics, no telemetry, no backend server, and no user accounts. Your text and data stay private.
• Guided setup for AI provider selection and macOS Accessibility permissions in under a minute.