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A style and grammar checker for English, German, French, Dutch, Spanish, Russian, and several other languages. It finds many errors that the Google spell checker cannot detect.
Listing updated:August 13, 2021
Works with:
2,013,941
Overview
★ Finds many errors that Google's spell checker cannot detect
★ No registration needed
★ Supports more than 25 languages (see below)

See https://languagetoolplus.com/addon-redirect for our browser add-on, which also supports Google Docs.

With this extension you can check text with the free style and grammar checker LanguageTool. LanguageTool finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word, and it can detect some grammar problems. It supports more than 25 languages, including English, German, Spanish, French, Dutch, Polish, and Russian.

With LanguageTool our aim is to give users a fully-featured 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’s also smart enough to recognize mistakes that native speakers commonly make and it will improve your writing overall. This grammar and spelling correction works across all variations of common language; distinguishing between U.S. and British English, for instance. LanguageTool also features a personal dictionary for exceptions or words that you might commonly use but that are not found in a conventional dictionary. 

Usage: Just click "Add-ons > LanguageTool > Check text" in the menu to start proofreading your document. The detected errors will be shown on the sidebar. Select an error and it will be highlighted in the text.

Unlike Grammarly and Ginger, LanguageTool works for many languages.

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 the texts you check. In fact, we don't even 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), Arabic, 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
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Grammar and Spell Checker - LanguageTool will ask for the permissions shown below. Learn more
Grammar and Spell Checker - LanguageTool will need access to your Google account
This will allow Grammar and Spell Checker - LanguageTool to :
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See your personal info, including any personal info you've made publicly available
Reviews
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A User of Grammar and Spell Checker - LanguageTool
February 3, 2018
Although it only accepts 20 thousand word error checking at a time,this doesn't really bother me much. Simply the fact that it's free and detects way more errors than I expected. If only google docs had such a feature by default and detected more errors automatically.
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A User of Grammar and Spell Checker - LanguageTool
November 14, 2017
A fantastic application - and free to boot! I was surprised - and pleased - that LT picked up more possible errors than i imagined. It picks up a lot of 'false positives,' but i'd rather it do this than miss some out. In any case, LT makes it easy to review suggestions, dismiss them or make changes with just a click. This application has helped me a lot. Thank you Daniel for this fine tool!
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A User of Grammar and Spell Checker - LanguageTool
December 28, 2018
Extremely useful thing. An indispensable tool in daily work with text, especially for journalists and editors, because under heavy load attention is dissipated and the eye is blurred. I use LanguageTool in browsers, Google Docs and Microsoft Word. Recommend! Чрезвычайно полезная вещь. Незаменимый инструмент в повседневной работе с текстом, особенно для журналистов и редакторов, поскольку при большой нагрузке внимание рассеивается и глаз замыливается. Использую LanguageTool в браузерах, в Google Docs и в Microsoft Word. Рекомендую!
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A User of Grammar and Spell Checker - LanguageTool
September 30, 2018
The software works relatively well, but when it comes to anything over 20,000 characters (around 4,000 words) it reaches its upper limit. This is a bit of a problem for me.
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A User of Grammar and Spell Checker - LanguageTool
August 8, 2019
I have been using Language Tool for the past ~1.5 years checking school papers, resume, cover letters, and important correspondence. I like the fact that I am in control and and can run it when I want. It is not intrusive like another highly advertised spell and grammar checker.
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A User of Grammar and Spell Checker - LanguageTool
July 25, 2019
Ok, I added it and allowed access as per script (twice). Selected text I want to check. When I click on check button all I get is ScriptError: Authorization is required to perform that action. How do I get it to work?
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A User of Grammar and Spell Checker - LanguageTool
August 21, 2019
Used to work perfectly. Now it does not even have a close buton for wrong suggestions... its not an upgrade its a downgrade
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A User of Grammar and Spell Checker - LanguageTool
November 1, 2018
Guys, I can't select text and check it now (after update). Please return this option. It's best checker.
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A User of Grammar and Spell Checker - LanguageTool
September 11, 2019
Google docs really needs this – but at least in Spanish, it does not pick up the two basic grammar mistakes in this sentence: "Hay dos casa rojo."
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A User of Grammar and Spell Checker - LanguageTool
March 27, 2019
Only just tried it, but works really well on the text I had, especially for grammar/punctuation errors that Google Docs doesn't check, eg spaces in wrong place etc. No sign-up required, unlike similar tools. Nice job!
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