Harper on a Mac
Offline, Rust grammar checker (LanguageTool alt.) · Tools
Harper (by Automattic; *not* HarperDB) is an offline, privacy-first grammar and style checker written in Rust; a fast local Grammarly/LanguageTool alternative. It ships as an LSP language server (harper-ls) for editors, plus a CLI, a WASM library, and browser/Obsidian integrations; a developer/writing tool, not a web service. Install with brew install harper. Apache-2.0.
Run Harper with FrontierStack
Install or connect Harper; then check its status, ports and certificate from FrontierStack. The same screen links to firewall checks and backups where they apply.
Run it from your Mac.
FrontierStack installs, monitors and secures services on this Mac and on linked servers; and keeps your passwords and keys out of any AI's sight.
Download FrontierStackApple notarized · Safe & secure · macOS 13 Ventura+