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Harper

Open Source Updated 39d ago

Offline, privacy-first grammar checker. Fast, open-source, Rust-powered

npm install -g harper-ls

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Offline, privacy-first grammar checker powered by Rust and WebAssembly. Runs entirely client-side — no data sent to servers. VS Code extension, Neovim plugin, and CLI available. Sub-millisecond grammar checking for developers who care about their writing.

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chrome-extensiondeveloper-toolsenglish-languagegrammar-checkernodejs

View on GitHub ★ 10,114Rust

Last commit 32d ago364 open issues

✅ Actively maintained

Using this saves ~50k tokens vs building from scratch

AI agents recommended this tool 1 time

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