What Is Harper?

Harper is a grammar checker designed to run anywhere there is text (so really, anywhere). Most Harper users are catching their mistakes in Neovim, Obsidian, or Visual Studio Code.

<script> import Editor from "$lib/components/Editor.svelte" </script> <div class="h-96"> <Editor content={`You can try out a editor that uses\nHarper under the hood here.\n\nIt is rnning in your browser right now. \n\nNo server required!`}/> </div>

How Does It Work?

Harper takes advantage of decades of natural language research to analyze exactly how your words come together. If something is off, Harper lets you know.

In a way, Harper is an error-tolerant parser for English.

Versioning Policy

Harper uses semantic versioning.

All components and integrations of Harper stay in version sync, including but not limited to:

• harper.js
• harper-core
• harper-comments
• harper-ls
• The Obsidian Plugin
• The VS Code Plugin
• The Chrome Extension

That means that a change in harper.js can cause a release of the Obsidian plugin with a version bump, even if nothing has directly changed in the Obsidian plugin. We do this because we view Harper not as a disparate set of integrations, but as a holistic system accessible in a wide variety of places.

For the time being, we only actively develop and maintain the latest version of Harper (seen in the master branch on GitHub). If long-term support for older versions is desired, please let us know and we will do our best to accommodate you.

Projects Using Harper

Some of the open-source projects using Harper include:

• Gherlint
• walletbeat
• Stencila
• fixmyspelling
• Tally
• local-harper

Are you using Harper in your open source work and want to be included in this list? If so, please open a PR. We would be happy to add it.