Harper LS extension for the Zed editor

Documentation for Harper

Grammar checking that respects your privacy. Real-time spelling and style suggestions across all macOS apps, running entirely on-device.

local grammar checker built with harper.js

Minimal Python FFI for the `harper-core` Grammar Checker library

A Harper plugin for OAuth 2.0 and OpenID Connect authentication with multi-provider support.

Syntax highlighter for VS Code for the curated dictionary of the Harper grammar checker

Tree-sitter grammar for the curated dictionary of the Harper grammar checker

Harper is an IDE plugin that integrates the Harper Language Server Protocol (LSP) support into JetBrains IDEs.

Grafana datasource plugin for Harper

Harper backend

Extensible language checker utility supporting pluggable backends providers and custom checking plugins over wasm.

Local-first text polishing across Android, Desktop, and Web.

Lightweight HTML scratchpad for grammar checking text copied from apps without Harper support (BBEdit, Things, Day One, Mail, etc.). Works with Harper's Chrome/Firefox extension. ~10x less memory than Harper's homepage. Offline, private, plain text only, disposable. Copy → paste → check → fix → copy back.

Fork of Automattic/harper — offline, privacy-first Rust grammar checker with LSP, browser & IDE integrations. I contribute upstream.

Minimal C FFI for the `harper-core` Grammar Checker library

Check grammar on static webpages with Harper