Select text
Highlight the rough prompt, message, listing, or sentence you want to improve.
Two-key prompt improvement for Mac
Improve any prompt before you send it
Select text anywhere on your Mac, press Option+Space, and Justype rewrites it in place.
Native macOS app. No browser extension. Bring your own OpenAI-compatible API key.
Prompt draft
Selected text
make me a better prompt for my ebay listing, mention condition and that i can ship fast
Option+Space
Rewritten in place
Create a clear eBay listing description that highlights the item condition, key details, and fast shipping availability.
What Justype does
Justype improves prompts and everyday text anywhere on macOS.
It is built for the moment before you send: a ChatGPT prompt, a Gmail reply, a WhatsApp message, a Vinted description, an eBay listing, or a paragraph in docs.
Press two keys
Use Option+Space. Justype stays out of your way until you need it.
Keep writing
The improved version replaces the selection in the app you were already using.
Where it helps
One shortcut for prompts, listings, messages, and school work.
ChatGPT, Claude, Gemini, Cursor, Perplexity
Better AI prompts
Turn rough instructions into clearer prompts before sending them to an AI tool.
Vinted, eBay, Facebook Marketplace
Cleaner listings
Improve product descriptions, condition notes, and buyer messages without opening another editor.
WhatsApp, Gmail, Slack, Discord
Sharper messages
Polish replies, emails, and short updates while staying in the conversation.
Docs, notes, essays, tutor emails
Student writing help
Make explanations clearer, fix awkward phrasing, and rewrite notes into something easier to study.
Low/no UI
No dashboard. No browser extension. No copy-paste routine.
Justype is intentionally small: a menu bar app, a shortcut, and your selected text. It is meant to feel like autocorrect for prompts.
- No writing workspace to manage
- No browser lock-in
- No switching tabs to rewrite
- Just select text and press Option+Space
Bring your own key
Your provider, your API key, your workflow.
Justype uses the OpenAI-compatible provider you configure. Your API key is stored locally in macOS Keychain, and selected text is sent directly to that provider for rewriting.
Quick answers
Justype FAQ
What is Justype?
Justype is a Mac app that improves selected prompts and text anywhere on macOS. Select rough text, press Option+Space, and Justype rewrites it in place.
How does Justype work?
Justype temporarily copies your selected text, sends it to your configured OpenAI-compatible provider, pastes the rewritten version, and restores your clipboard.
Can Justype improve prompts for ChatGPT?
Yes. Justype is designed for people writing prompts into ChatGPT, Claude, Gemini, Cursor, Perplexity, and other AI tools.
Does Justype work in Gmail, WhatsApp, Vinted, eBay, and docs?
Justype works in normal text fields across macOS, including browsers and many apps used for email, messaging, marketplace listings, documents, notes, and student writing.
Is Justype a browser extension?
No. Justype is a native macOS menu bar app, so it can work across apps instead of being limited to one browser.
Launch pricing
$29/year
One subscription covers up to three Macs. AI usage is billed by your configured provider.