Your words never leave your device.
Like the rest of Harper, Harper Desktop runs entirely on your Mac. No cloud round-trips, no telemetry, no account, no LLM in the loop.
Your Mac The cloud
Works in every app.
Use Harper Desktop in the apps you use every day such as Mail, Slack, Notes, Pages, and Discord.
Download for macOS macOS 14+ · Apple Silicon & Intel
J
Jordan2:14 PM
heads up: the deploy is taking alot longer then expected. might push to tommorrow.
To: design@example.com
Re: Q3 marketing review
Thanks for sending these over, really apreciate the detail. I'll loop in the design team and we can have a draft back to you by friday.
Birthday dinner - saturday
Today at 11:08 AMReserve table at Augusto's for 8 pm. Pick up a cake on the way, noone is allergic to nuts.
R
rileyToday at 2:14 PM
not sure if its worht shipping yet, the copy still needs another passs imo
Every text field. Same Harper.
If your cursor is blinking, Harper is watching. Harper Desktop hooks into macOS text inputs so the same suggestions follow you across the apps where you write.
Gmail
iMessage
WhatsApp
Slack
Discord
Telegram
Notion
Obsidian
Linear
GitHub
Things
Scrivener
...and every other text field on macOS. If you can type in it, Harper helps.
Suggestions in under 10ms.
Harper runs locally and is built for speed. You get a feedback loop that keeps up with your typing, without waiting for a server.
Tune the rules. Build your own dictionary.
Every rule in Harper is toggleable. Add team jargon, product names, and favorite phrases to your personal dictionary, and they stop being underlined everywhere on your Mac.
- Pick your English. British, American, Canadian, Australian, or Indian.
- Enable per app. Grammar checking only where you want it.
- Make the rules. Build custom rules using Weirpacks.
Harper - Settings
Free. Forever. Yours.
Harper Desktop is free, like the rest of Harper. No account or credit card necessary.
Download for macOSmacOS 14 Sonoma or later · Apple Silicon & Intel
FAQs
Does Harper Desktop send my writing anywhere?
No. Like the rest of Harper, everything runs locally. No accounts, no telemetry, no snooping servers.
What are the system requirements?
macOS 14 Sonoma or later. Apple Silicon and Intel are both supported.
Is it really free?
Yes. Harper Desktop is free, like the rest of Harper. The source is on GitHub under Apache-2.0.
What about Windows and Linux?
Not yet. We started on macOS to get the system-wide integration right; other platforms are on the roadmap.