Improve your writing,
anywhere on your Mac.
Select text. Press a shortcut. Preview the improved version. Replace it instantly. A private, native utility that works across all your apps.
Hi Sarah,
I just wanted to follow up on the project. I am writing this to see if we are still going to be able to hit the deadline that we talked about for Friday. Let me know if you need anything from my end.
Best,
Alex
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See SwiftPen in action
A quick walkthrough of how I use it to write faster every day.
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A workflow that stays out of your way
No copying and pasting between apps. No context switching. Just select, press, and improve.
Select text anywhere
Highlight the text you want to improve in any macOS application.
Press your shortcut
Hit your custom keyboard shortcut to summon the SwiftPen panel.
Preview and replace
Review the AI suggestion and replace the original text instantly.
Why Native?
Stop breaking your flow by switching to a browser tab or dealing with invasive floating widgets. SwiftPen is built specifically for macOS.
Built for people who write all day
A utility that respects your time, your privacy, and your workflow.
Works across apps
Slack, Mail, Notes, Safari, Chrome, Docs. If you can select text, SwiftPen can improve it.
Fast keyboard workflow
Summon the panel instantly with a custom shortcut. Keep your hands on the keyboard.
Preview before replacing
Never send an AI hallucination by mistake. Always review the suggestion before it replaces your text.
Private by design
Your text is only sent when you explicitly request an improvement. No background keylogging.
Local mode available
Run lightweight models entirely on-device for maximum privacy and zero latency.
Custom actions
Create your own prompts like "Make it sound like a pirate" or "Format as a markdown table".
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 even choose which language model 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.
Bring Your Own Key. Use our blazing-fast cloud models, or plug in your own OpenAI/Anthropic API key, or run local models via Ollama.
Custom Prompts
More than just rewriting.
SwiftPen is a complete, private AI powerhouse running directly on your Mac.
Your private, offline AI assistant.
Not just for rewriting. SwiftPen includes a full chat interface powered by the local LLM. Ask questions, brainstorm, and get answers without ever sending your data to the cloud. It's like having ChatGPT running locally on your Mac.
Based on the local file you provided, here are the key takeaways:
- Revenue grew by 14% YoY.
- Customer retention hit an all-time high of 92%.
- The new sync engine rollout was successful.
Tailor it to your exact voice.
Create custom rewrite modes with specific prompts. Whether you need "Tweeter", "Legalese", or "Gen Z slang", SwiftPen adapts to your exact needs and saves them for one-click access.
Your text is yours.
We don't want it.
SwiftPen is designed to be a utility, not a data vacuum. We only process the text you explicitly select and send for improvement. There is no background keylogging, no screen recording, and no continuous monitoring.
Selection-first workflow. Nothing happens until you highlight text and press your shortcut.
Local models available. Choose to run lightweight models entirely on your Mac for absolute privacy.
No training on your data. If you use our cloud models, your requests are never used to train future AI models.
Why does it need Accessibility access?macOS requires Accessibility permissions for apps to read highlighted text and simulate keystrokes (to replace the text). SwiftPen uses this API strictly for this purpose and never logs your typing.
Universal Compatibility
Because SwiftPen uses native macOS accessibility APIs, it works almost everywhere you can type.
Loved by people who write
Don't just take our word for it. Here's what early users are saying.
"It's the first AI tool that actually feels like a native Mac app. It doesn't get in my way, it just sits quietly until I need it."
Sarah J.
Product Manager
"I use the 'Make Polite' action constantly for Slack messages. It saves me from sounding too blunt when I'm in a rush."
David L.
Software Engineer
"The fact that I can preview the text before it replaces anything is huge. I trust it because I'm always in control."
Elena R.
Freelance Writer
Simple, transparent pricing
One plan, all features. Choose how you want to pay.
Lock in this price forever. Increases to $149/year after 100 sales.
SwiftPen Pro
Everything you need to write better, faster.
- Unlimited cloud AI improvements
- Local AI model support (100% private)
- Works in all macOS apps
- Custom instructions & prompts
- Preview before replacing
- Custom keyboard shortcuts
Secure checkout via Lemon Squeezy.
Frequently asked questions
Everything you need to know about SwiftPen.
Write better, instantly.
Select text anywhere on your Mac, improve it instantly, and keep writing. Experience the most native AI writing assistant for macOS.
Requires macOS 13.0 or later.
14-day free trial.