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Harper Language Server

Harper is an offline, privacy-first English grammar checker designed for developers, delivering fast grammar and language suggestions locally. The harper-ls is the Language Server Protocol frontend for Harper, supporting comment parsing and integration with developer tools.
Latest: 2.0.0
Last checked: Mar 16, 2026 6:45pm
Followers: 0
Rank: 251/17422
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Overview

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License: Apache-2.0Winget: Available
Product Page Support Page Download Page Installer File

Version & Lifecycle

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Current: 2.0.0 N-2: 1.11.0 Avg cadence: Every 5 days

Tags

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rust webassembly developer-tools grammar-checker english-language language-server

Top Contributors

Top sitewide contributors:

  1. Anbarasan
  2. nico_k
  3. Bob
  4. Vigneshwaran

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Release Notes & Updates

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Avg cadence: —
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Packaging Notes

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Rust-powered, open-source, privacy-first grammar checker with Language Server Protocol frontend

Notes

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Acquired by Automattic in 2024; open source with Apache-2.0 license; latest release v0.54.0 as of July 2025