Harper Offline Grammar Checker Automattic

---
name: "Harper Offline Privacy-First Grammar Checker by Automattic"
slug: "harper-offline-grammar-checker-automattic"
description: "Harper is an offline, privacy-first grammar checker written in Rust by Automattic. It runs locally with sub-10ms response times, supports LSP for editor integration, compiles to WebAssembly for browser use, and provides grammar, spelling, and style checking without sending text to external servers."
github_stars: 10182
verification: "listed"
source: "https://github.com/Automattic/harper"
category: "Content Writing & SEO"
framework: "Multi-Framework"
tool_ecosystem:
  github_repo: "Automattic/harper"
  github_stars: 10182
---

# Harper Offline Privacy-First Grammar Checker by Automattic

Harper is an offline, privacy-first grammar checker written in Rust by Automattic. It runs locally with sub-10ms response times, supports LSP for editor integration, compiles to WebAssembly for browser use, and provides grammar, spelling, and style checking without sending text to external servers.

## Installation

No source-backed install or usage instructions could be extracted automatically. Review the upstream project before running this skill in a sensitive workflow.

- Source: https://github.com/Automattic/harper

## Source

- [Agent Skill Exchange](https://agentskillexchange.com/skills/harper-offline-grammar-checker-automattic/)