Private Grammar Checker - Harper

Adesynn Weber2026年1月26日

★★★★★1

Does not work on google docs or outlook. I can't seem to get it to work on Word either, this is really disappointing. I've been trying to find a replacement for languagetool since they now require subscription, and grammerly is awful. Should this be resolved and the extension actually works on docs and outlook, and perhaps create an IOS app version to install on mac for Word I'd reconsider it.

Nicolas Parot-Alvarez2026年1月20日

★★★★★5

Extremely promising, I love the privacy focus, but it does not support enough websites yet. My main use case is Slack in the web browser, and it does not seem to work there, so it is not yet a viable choice for me compared to competitors. I have found a Github discussion mentioning Slack, but it seems dead. Edit: It is now working well in Slack, so I was able to remove the lesser competitor QuillBot. Great tool, thank you!

narujin2026年1月19日

★★★★★4

just needs german support then its perfect

Amay2026年1月17日

★★★★★5

The only grammar extension you need. You should probably also disable the system and browser spell check and use this for that as well as grammar usage. The open-source community is great.

Nossy Drelich2026年1月16日

★★★★★5

Thank you very much for making this! It works great and works smoothly! This is a must install after every new chrome install.

Cabeza De Termo2026年1月16日

★★★★★1

In doesnt work for the only 2 reasons i've installed this: youtube and reddit coments. In youtube doesnt even detect words, and in reddit it underline errors but the correction pop up doesnt show up when you click on it.

Aziz Mejri2026年1月9日

★★★★★5

Works like a charm, better than the overly expensive alternatives.

Maryellen Williams2025年12月5日

★★★★★5

It's helping me catch mistakes I wouldn't have noticed right away. When I looked at some of the flags and thought they were wrong i just looked for a different word or read the sentence out and realized where I went wrong. For my needs it's great. It does have some bugs, but I'm expecting they will eventually get worked out. Like some of the capitalization flags.

Mar Belle2025年10月27日

★★★★★3

I really wanted to like this and escape Grammarly but unfortunately it doesn't seem up to the task, missing many grammar errors that Grammarly picks up and most annoyingly, given that I do most of my writing within the Wordpress editor, marking any sentence which contains a link as an uncapitalised sentence error proceeding and following the link. I might check it out again in the future but as is, Harper feels not at all production ready for what is a very common writing case.

Rogerio Taques2025年10月16日

★★★★★5

I've been using Harper instead of Grammarly for a few months already, and I can't be happier! I can't wait to see the great improvement when this tool reaches version 1.0.0! Great job! I hope that, eventually, it will also support languages other than English.