Harper

Install Harper for desktop apps, browsers, code editors, and developer workflows.

Harper Desktop brings private grammar checking to text fields across macOS.

Set up harper-ls in Neovim with nvim-lspconfig and customize grammar checking options.

Install Harper in Obsidian to check English notes and learn about plugin setup and support.

Harper is a free, private, open-source grammar checker that operates offline on a user’s device.

A developer replaces Grammarly with Harper, an open-source writing assistant, to improve text quality across platforms. The user relies on tools like Apostrophe, Obsidian, and Visual Studio Code for daily content creation. Harper integrates seamlessly into existing workflows, offering a privacy-focused alternative for grammar and structure checks.

Aug 2025XDANews article

Harper introduces an open-source, on-device grammar checker as an alternative to proprietary tools like Grammarly. It competes with LanguageTool, which shifted to US-based data processing post-acquisition. Harper emphasizes privacy by avoiding cloud dependency, aligning with user concerns over centralized data handling.

Jul 2025GadgeteerNews article

Justin Pot introduces Harper, a new offline writing assistant designed as an alternative to Grammarly. It integrates directly with Obsidian, a popular note-taking application, offering grammar and style suggestions without requiring an internet connection.

Apr 2025LifehackerNews article

Harper provides a spelling and grammar checker for Obsidian, offering a discreet, fast, and private experience. The tool currently supports only English, which may limit its broader utility. Users highlight its efficiency and privacy-focused design as key strengths.

Apr 2025Obsidian RocksNews article