Refine: Offline AI Grammar Checker

Check grammar privately as you write in Chrome. Refine's AI runs offline on your Mac, so your writing stays yours. Free.

Refine is an offline AI grammar checker. It checks your grammar and fluency as you write in Chrome, explains every fix in plain language, and runs its AI model on your own Mac, so your writing never has to leave your computer. This extension brings Refine, the offline grammar checker for Mac, into your browser. Install Refine from https://refine.sh, then add this extension. OFFLINE AND PRIVATE • Refine's AI runs locally on your Mac. With the built-in local model, nothing you write is sent to a server, and checking works without an internet connection. • The extension itself makes no network requests. It passes your text only to the Refine app on the same Mac, through Chrome's native messaging. • No account, no tracking. The extension stores nothing but its own settings. GRAMMAR CHECKING AS YOU WRITE • Grammar and fluency suggestions underlined as you type • One-click Apply, or apply with a keyboard shortcut without leaving the keyboard • Explain: the rule behind each fix, grounded in your own sentence • Dismiss suggestions you don't want, or report a bad one • A panel that lists every suggestion on the page • 36 languages WHERE IT WORKS Refine checks writing in Google Docs today, with more sites on the way. The Refine app also checks your writing in other Mac apps, not only Chrome. FREE, WITH NO ACCOUNT Refine is free to use with no sign-up. It is a native Mac app for macOS 14 or later. A PRIVATE ALTERNATIVE TO CLOUD GRAMMAR CHECKERS If you want AI grammar checking without sending your drafts to the cloud, Refine gives you context-aware suggestions and clear explanations from a model that runs on your own computer. HOW TO USE 1. Download and open Refine for Mac from https://refine.sh 2. Add this extension to Chrome 3. Start writing in a supported site, such as a Google Docs document you can edit. Refine checks as you type; hover a highlight to see the suggestion. If the toolbar button says Refine isn't installed or isn't running, open Refine on your Mac and the page connects on its own. Questions or feedback: https://refine.sh