Harper

Harper is an open-source grammar and spell checker that runs entirely on the device. It covers US, UK, Canadian, Australian and Indian English, and performs checks locally without cloud round-trips, telemetry or an LLM. Integrations listed include Obsidian, Chrome, Firefox, WordPress, Visual Studio Code, Neovim, Helix, Emacs, Zed and Sublime Text.

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0 shouts Added Sep 23, 2026 writewithharper.com
writewithharper.com/
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