See SwiftPen in action.
Examples are the fastest way to understand the product. Here are the kinds of rewrites and custom actions SwiftPen is built for.
Experience the magic
Try the interactive playground below. See how SwiftPen transforms your writing instantly.
Make it yours.
Tailor every detail.
SwiftPen is built for Mac power users. Customize your global keyboard shortcuts, create your own specific AI prompts, and choose the local model that powers your experience.
Custom Prompts. Create specific actions like "Translate to Spanish", "Make it sound like a pirate", or "Summarize for an executive".
Global Shortcuts. Bind SwiftPen to whatever key combination fits your workflow best.
Local Models. Pick the on-device model that balances speed, quality, and privacy for your workflow.
Custom Prompts
Make it shorter
Trim long notes, messages, and paragraphs without rewriting the whole document from scratch.
Make it clearer
Turn rough ideas into concise, readable writing that is easier to send.
Make it sound like you
Custom actions let you save a voice or prompt you use all the time.
Why not ChatGPT or Grammarly?
ChatGPT is great when you want to start from scratch. SwiftPen is for the text already in front of you. Grammarly polishes. SwiftPen lets you dictate, fully rewrite, use custom prompts, and run natively offline on macOS.
Rewrite text without leaving the app.
Select text anywhere on your Mac, improve it in place, and stay in flow. Start your 7-day free trial, then choose monthly or lifetime billing if you want custom prompts and deeper control over the on-device model.
Requires macOS 13.0 or later.
No pressure to upgrade upfront.