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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★

Steve B2026年4月9日

Not a very intelligent spell checker. Laggy, bad corrections, missing words, if it even finds a word to suggest. Uses punctuation that really is not relevant. Tries too hard to insert itself to make itself seem more useful than it really needs to be. Overall, it could be a great extension if it smartened up in some ways, and dumbed itself down in other ways. All the people want is a simple, straight forward spell checker that does not make constant or unnecessary corrections and has smarter suggestions for misspelled words.

hemanth kumar2026年4月8日

Great effort unfortunately fails a basic test. Examples:(Too many False flags) "extention" will suggest extent<space>ion unless the split-word rule is disabled. "Ok" is being suggested by the spellchecker as oak / of / oh.

Edin Abdulahi2026年4月6日

It's not working on zendesk

Parth Pathak2026年4月3日

Why is it not working for me on Brave, i can see there is no mention of brave but all the other extension with spell checking capabilities are working properly but this is not working even for a second, its like i have installed it but it is not turning on or what, i tried clicking the extension and tried turning On/Off but nothing worked. I would really love to use this private open source Grammar checker. Note- giving one star so that you can guide me to fix this issue or provide an update (I couldn't find a fix online that would have worked for me)

Christiana osuji2026年4月2日

it was great

Yingjie Liu2026年3月29日

Amazing grammar tool, clean and effective, always like compact tools like this!

Michael Newbeing2026年3月27日

It is very nice if you use only one language (English). If you are a multilingual writer and English is your second language, things become more complicated. The extension doesn't detect that text is not in English and is aggressively trying to correct every word, which is a bit disturbing. Still deciding whether to keep it or uninstall.

Michael Coles2026年3月27日

I got rid of Grammarly after it added ai slop, and this is a basically perfect replacement! It gets stuff wrong now and then but no biggie. My one issue is that it reads lists as sentences, so it keeps highlighting my entire document and saying it's a hundred-word-long sentence or something. Otherwise, chef's kiss!