What is this?
Harper is an offline, privacy-first English grammar checker written in Rust that runs locally instead of sending your text to a server.
Harper is an offline, privacy-first English grammar checker written in Rust that runs locally instead of sending your text to a server.Is this an app, or something I plug into my editor?It's a grammar-checking engine with a language server (harper-ls) and a WebAssembly build (harper.js), distributed as integrations for editors and browsers rather than a standalone desktop app.
It's a grammar-checking engine with a language server (harper-ls) and a WebAssembly build (harper.js), distributed as integrations for editors and browsers rather than a standalone desktop app.How do I start using it?Install it as an extension for your editor of choice - there are official integrations for VS Code, Neovim, Helix, Emacs, Zed and Obsidian, or embed harper-ls / harper.js directly into your own tooling.
Install it as an extension for your editor of choice - there are official integrations for VS Code, Neovim, Helix, Emacs, Zed and Obsidian, or embed harper-ls / harper.js directly into your own tooling.Do I need to set up a server or accounts to use it?No - Harper runs entirely offline on your machine, so no account, API key, or backend server is required.
No - Harper runs entirely offline on your machine, so no account, API key, or backend server is required.Does it support languages other than English?Not yet - Harper currently only checks English, though the core architecture is designed to be extensible to other languages in the future.
Not yet - Harper currently only checks English, though the core architecture is designed to be extensible to other languages in the future.Does my writing ever leave my computer?No, Harper is built to be completely private and processes everything locally instead of uploading your text like Grammarly does.
No, Harper is built to be completely private and processes everything locally instead of uploading your text like Grammarly does.Why did the author build Harper instead of using Grammarly or LanguageTool?Grammarly was expensive, invasive, and sent all writing to its servers, while LanguageTool needed gigabytes of RAM and a 16GB dataset and was slow; Harper was built to lint in milliseconds using a fraction of that memory, all while staying fully private.
Grammarly was expensive, invasive, and sent all writing to its servers, while LanguageTool needed gigabytes of RAM and a 16GB dataset and was slow; Harper was built to lint in milliseconds using a fraction of that memory, all while staying fully private.How fast and lightweight is Harper compared to LanguageTool?It takes milliseconds to lint a document and uses less than 1/50th of LanguageTool's memory footprint.
It takes milliseconds to lint a document and uses less than 1/50th of LanguageTool's memory footprint.What are similar projects?pdfcraft, wordcraft, lightcraft, CalcKernel, figcraft, photosuite, ty, dioxus
pdfcraft, wordcraft, lightcraft, CalcKernel, figcraft, photosuite, ty, dioxusWhich topics is it in?language-server, obsidian, neovim, svelte, webassembly, vscode-extension, chrome-extension, wasm, offline, rust, react, privacy
language-server, obsidian, neovim, svelte, webassembly, vscode-extension, chrome-extension, wasm, offline, rust, react, privacy