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Private Grammar Checker - Harper

The private grammar checker for 21st Century English

用户数40K当前公开安装规模

评分4.2商店平均评分

评论数101公开评论体量

Manifest 版本V3插件平台版本

7日增长0近 7 天净增用户

7日增长率0%相对周增长速度

视觉预览

Private Grammar Checker - Harper 媒体预览

3 项素材

趋势

用户增长趋势

按已采集快照查看用户数变化。

用户增长趋势

评分趋势

近 7 日评分趋势

展示最近 7 日窗口内已采集的评分快照，辅助判断近期评分是否稳定。

7 日评分变化

起始值

4.14

日/周/月增长表现

同口径展示 1 天、7 天、30 天的绝对增长与增长率。

1日增长持平

00%

7日增长持平

00%

30日增长增长

+10K+33.3%

技术摘要

版本、语言与抓取信息

查看发布时间、版本、支持语言、最近更新和抓取时间。

版本1.12.0

ManifestV3

大小15.46MiB

语言数1English

发布时间--

插件简介

查看插件说明、主要功能和适用场景。

Harper is an English grammar checker designed to be just right. I created it after years of dealing with the shortcomings of the competition.

Grammarly was too expensive and too overbearing. Its suggestions lacked context, and were often just plain wrong. Not to mention: it's a privacy nightmare. Everything you write with Grammarly is sent to their servers. Their privacy policy claims they don't sell the data, but that doesn't mean they don't use it to train large language models and god knows what else. Not only that, but the round-trip-time of the network request makes revising your work all the more tedious.

LanguageTool is great, if you have gigabytes of RAM to spare and are willing to download the ~16GB n-gram dataset. Besides the memory requirements, I found LanguageTool too slow: it would take several seconds to lint even a moderate-size document.

That's why I created Harper: it is the grammar checker that fits my needs. Not only does it take milliseconds to lint a document, take less than 1/50th of LanguageTool's memory footprint, but it is also completely private. That's the power of open source.

评价

最新评论快照

查看最近评论和评分分布。

商店综合星级4.2Chrome 商店给出的聚合评分，包含只有打分但没有同步评论正文的情况

已同步评论均分3.9仅基于下方已同步评论正文计算

有内容评论70已同步的评论正文数量

总评分/评论数101Chrome 商店公开评分/评论计数

商店综合星级：4.2。下方星级分布只统计已同步评论正文；如果某个插件只有公开分数、没有真实评论正文，这里可能为空。

5★

4★

3★

2★

1★

Justin Quinn2026年3月19日

5 stars until it stopped working, turning off spellcheck without being able to be turned on again.

Kai Al2026年3月18日

great tool i love it

Madison Dillard2026年3月18日

this is exactly what I was looking for. A free grammar correcter without AI that can be customized to you.

Jupiter 00002026年3月17日

jak będzie polski język, to dam 5 gwiazdek

rahul ganesh2026年3月17日

now with google docs support, it's just an objectively better grammarly, as it is signifigantly faster and free

Jonno Andrews2026年3月13日

Brilliant. Exactly what I was looking for

Rogerio Taques2026年3月13日

Usually, I don't rate products with 5 starts because I believe there is always room for improvements. However, while Harper still has to improve in some aspects, it is an outstanding initiative and great effort to bring such a feature for FREE. I can't thank you guys enough for doing it, so the minimum I can do is definitely rating it with 5 starts. Maintaining tool like this is, indeed, a piece of work, and I'm really glad these guys have been doing a great job on it. It has been a while since I started using Harper (replacing Grammarly entirely). I do use it as a browser extension and, also, as an LSP in Zed/VScode when working on my projects.

Alexander Dalat2026年3月12日

I love the hard work put into the details of this extension. Some features are missing, yes, but it's progress towards the decaying open-source support for grammar checking (looking at you, LT). Showing love so that support can expand to Google Docs! Edit: also, as an extension developer myself, I know how difficult it is to support features involving input boxes, so show some love in the reviews and keep in mind that the developer is going out of their way to respond to most feedback (rare these days)! This is why it deserves a 5 in my eyes.

Jazz-axy2026年3月10日

Unimpressed by the actual correction. It detects mistakes quickly, yes, but the suggested correction is too often wrong and makes no sense. Then I have to manually fix the word anyway, basically doing its job. There's no way to give feedback that the suggestions were incorrect. Uninstalled from it giving me more work to do instead of less.