AI Grammar Checker & Paraphraser – LanguageTool icon

AI Grammar Checker & Paraphraser – LanguageTool

Extension Actions

CRX ID
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Status
  • Extension status: Featured
Description from extension meta

Instantly Enhance Your Texts with LanguageTool’s Grammar Checker and Paraphrasing Tool

Image from store
AI Grammar Checker & Paraphraser – LanguageTool
Description from store

★ Finds many errors that a simple spell checker cannot detect
★ No registration needed
★ Supports more than 25 languages (see below)
★ Works on almost any website including Gmail, Facebook, Twitter

This free extension ensures that your writing is error-free via the grammar and style checker LanguageTool. LanguageTool detects many errors that a simple spell checker cannot, such as grammar issues, commonly confused words, and punctuation oversights. Additionally, LanguageTool offers style suggestions to elevate your writing: synonym replacements for overused words, concise rephrasing of wordy sentences, and formal alternatives to commonly used expressions.

LanguageTool is designed with simplicity in mind, instantly analyzing your text as you type. It is compatible with most platforms, including social networks such as Twitter and LinkedIn, and e-mail services such as Gmail.

With LanguageTool, our aim is to give users a full-feature grammar checker and proofreader that will enable them to have control and confidence over their content. While LanguageTool is a vital extension for non-native speakers, it also recognizes many mistakes that are frequently made by native speakers. This grammar and spelling correction works across several varieties of commonly spoken languages, and is capable of distinguishing between American and British English. LanguageTool also features a personal dictionary for exceptions or words that you might commonly use, but are not found in a conventional dictionary; it will learn to recognize these words for future grammar checking and proofreading.

Unlike other services like Grammarly (a.k.a. Grammerly :-), QuillBot, and Ginger, LanguageTool supports more than 25 languages including English, Spanish, French, German, Polish, and Russian (see below for the complete list).

Your privacy is important to us: By default, this extension will check your text by sending it to https://languagetool.org over a securely encrypted connection. No account is needed to use this extension. We don't store your IP address. See https://languagetool.org/privacy/ for our privacy policy.

List of supported languages: English (Australian, Canadian, GB, New Zealand, South African, US), French, German (Austria, Germany, Swiss), Asturian, Belarusian, Breton, Catalan (also Valencian), Chinese, Danish, Dutch, Esperanto, Galician, Greek, Italian, Japanese, Khmer, Persian, Polish, Portuguese (Brazil, Portugal, Angola, Mozambique), Romanian, Russian, Slovak, Slovenian, Spanish, Swedish, Tagalog, Tamil, Ukrainian, Arabic

Latest reviews

Anonymous
because I don't know what lauguege I should choose!
Anonymous
Legal
Anonymous
good
Anonymous
TOP.
Anonymous
Hands down the best grammar and spell check tool out there!!
Anonymous
Great at correcting mistakes but a lot of times confuses its self and makes bad sugestions
Anonymous
Great, it is helping with my PhD Thesis
Anonymous
made my school work school work!
Anonymous
Great tool
Anonymous
I'm very happy with this tool.
Anonymous
fea
Anonymous
This is great for anyone! Specifically if you have issues with spelling or punchuation.
Anonymous
genial
Anonymous
It works very well!!! Loved it.
Anonymous
Very nice. Powerful, accurate and very easy to use. Just wonderful.
Anonymous
Very helpful
Anonymous
Very Useful
Anonymous
I've tried several different extensions for phrasing, grammar, sentence structure, spelling, etc - LanguageTool is by far the best of them all. It opens automatically on Gmail, Facebook, and everywhere else I type - you can go to a pop-out screen to practise a couple of ways you want to format your sentences/paragraphs and it tells you which is the best - AND sounds most like you! I highly recommend this, super easy to install, too.
Anonymous
localhost so my passwords are not sent over the nets
Anonymous
{5-stars with specified reason}
Anonymous
Really helps me look a lot smarter than I really am. Sign up you want regret it.
Anonymous
highly reccomended
Anonymous
its does not help
Anonymous
top
Anonymous
Highly Highly Recommended
Anonymous
This app is one of the best language or grammar checking extension I have used so far. Whenever I download a extension, there are 2 things I look for. First is the smoothness and design or the extension. Next is the most important, how does the extension flow even if I do not use the purchased version. And this extension has done it perfectly. Well done to the devs.
Anonymous
multiple languages supports German reasonably well great from granular to complex corrections
Anonymous
I had the paid version for two-years and used it mainly for email and Twitter. It let too many grammar errors go by, even if the sentence made no sense, so I decided not to renew it. Even for this simple review, I caught two errors that the extension didn't catch.
Anonymous
love it
Anonymous
Couldn't do my work without this extension!
Anonymous
Fantastic!!!
Anonymous
stellar product!
Anonymous
This extension claims to have support for Norwegian, but it lacks the most basic words and is completely useless. It is also unable to auto-detect Norwegian if I have Norwegian and English selected as my preferred languages. Uninstalling immediately.
Anonymous
Super
Anonymous
Amazing extension. Simple, easy and effective. Works in every site and it is such a great tool for typing in different languages.
Anonymous
the best. thank you
Anonymous
Love it. I am learning Spanish by writing short stories or talking my way through the language.
Anonymous
good enough, really good
Anonymous
ta biueno
Anonymous
Excellent! It's very useful.
Anonymous
it is good for school
Anonymous
too good.
Anonymous
Love this, THANK YOU! Here's my review from my experience with Grammarly to sum it up: Grammarly is great if you want to a non-stop BUY PREMIUM pop-up in front of your face every time you make a mistake or even regular sentences in general that it thinks could be better. The free version is so incredibly annoying, unintelligent, and unhelpful, it did the opposite of make me want to pay for an upgrade and felt more like a virus than an extension. I tried the LanguageTool extension instead; INSTANTLY more helpful, less invasive, calmer colors, and no pressure to upgrade. They just provide a decent tool/service for free and offer better features for a price, totally fair, but they don't shove the offer your face more than they provide the tool/service!
Anonymous
super helpful, I use it everyday
Anonymous
very very helpful
Anonymous
far better then grammarly! super happy!
Anonymous
LanguageTool is a great choice for translation and grammar checking, but for writing tools, I recommend TinaMind's Wiseinks.
Anonymous
very very helpful
Anonymous
helpful
Anonymous
LanguageTool is an outstanding writing assistant that goes far beyond basic spellcheck. It not only catches typos and grammar slips, but also offers smart style improvements, tone suggestions, and clarity enhancements that make your writing sharper and more professional. Whether you're crafting emails, reports, or creative content, it adapts to your context with multilingual support and a sleek, distraction-free interface. One of its biggest strengths is its real-time feedback, which is both helpful and non-intrusive. It flags issues clearly, explains them in simple terms, and offers one-click fixes — no digging through clunky menus. Plus, it supports over 20 languages, making it incredibly valuable for international teams and multilingual writers. Compared to tools like Grammarly, LanguageTool stands out for its open-source roots, customizable rules, and privacy-respecting design. It even integrates smoothly into your browser, documents, and email, so your writing stays polished wherever you work. In short: LanguageTool is clean, smart, fast — and a must-have for anyone who takes their writing seriously.