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Grammar and Spell Checker - LanguageTool
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.
LanguageTooler GmbH
556,826 users
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Overview
★ Finds many errors that Google's spell checker cannot detect
★ No registration needed
★ Supports more than 25 languages (see below)

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), 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
Reviews
A User of Grammar and Spell Checker - LanguageTool
January 25, 2020
Arbitrary 10,000 characters (not words) limit to try and force premium purchases. Yet another product that should come with a word processor pretending to be a service.
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A User of Grammar and Spell Checker - LanguageTool
January 24, 2020
Awesome just wish premium didn't cost money
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A User of Grammar and Spell Checker - LanguageTool
January 22, 2020
I love this app, but it's kinda dumb to pay extra money just to have better grammar. But, otherwise this app is really good!
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A User of Grammar and Spell Checker - LanguageTool
January 18, 2020
its like Grammerly but better
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A User of Grammar and Spell Checker - LanguageTool
January 18, 2020
I am Chinese.,it give me lots of help at learning english.
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A User of Grammar and Spell Checker - LanguageTool
January 17, 2020
really helpful with submitting documents for my classes. use it on every paper since i've installed it
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A User of Grammar and Spell Checker - LanguageTool
January 17, 2020
It really helps me when I am not sure if my grammar is correct and for writing tips.
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A User of Grammar and Spell Checker - LanguageTool
January 17, 2020
This tool is very useful for school or business work
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A User of Grammar and Spell Checker - LanguageTool
January 17, 2020
coolness
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A User of Grammar and Spell Checker - LanguageTool
January 16, 2020
Helped me with my google doc
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