25 BEST Grammar Checker Software in 2021 (Free/Paid)

A grammar checker is a software that checks your writing for grammatical mistakes, appropriate punctuation, misspellings, and issues related to sentence structure. Some programs also evaluate tone, style, and syntax to ensure your writing is flawless. These tools have functionality to check active and passive voice as well as sentence quality in your paragraphs.

Following is a handpicked list of Top Grammar Check Tool with their popular features and website links. The list contains both open source (free) and commercial (paid) software.

Best Grammar (Sentence) Checker Software: Top Picks

Name Active and Passive Voice Punctuation Check Link
ProWritingAid Yes Yes Learn More
Grammarly Yes Yes Learn More
WhiteSmoke Yes Yes Learn More

1) ProWritingAid

Prowriting Aid is one of the best grammar checker software that checks sentence quality, checks punctuation, passive and active voice usage. It allows you to check grammar, readability, and plagiarism related issues. This feature-rich tool is available in both free and premium versions.

Features:

  • Offers detailed report on all grammar errors
  • Runs a readability analysis allows you to test how easy it is to read and understand your draft
  • Provides a thesaurus for word suggestions
  • This is a free grammar checker supports Mac and Windows devices
  • You can Integrate with MS Word, Gmail, Open Office, outlook mail, Google Docs, Google Chrome, etc.


2) Grammarly

Grammarly is one of the best grammar checking software, which is widely used free grammar check app. It offers numerous writing styles, suggestions for grammar, vocabulary, and syntax. This active voice check software allows you to add words to your dictionary.

Features:

  • It helps you to detect spell mistakes and also offers suggestions for using the right pair of words.
  • This free grammar checker also points out confused prepositions.
  • You can check plagiarism by evaluating text against over eight billion web pages.
  • Offers Google Chrome, MS-Word, MS Outlook, plugins.


3) WhiteSmoke

WhiteSmoke free grammar checks free tool, which offers you quality proofreading. The tool not only correct simple spelling mistakes but also gives features of word choices style mistakes, meaning related errors, punctuation mistakes, and more.

Features:

  • This is one of the best grammar and spelling checker which helps you to detect hundreds of undetected errors.
  • Redesigned layout and user experience to increase efficiency.
  • This best grammar checker tool allows you to rebuild the ground up to improve performance and offers additional information about each error.


4) Scribendi

The scribendi.com is another useful grammar correction tool that provides a professional online editing service for all levels of content. The tool process up to 10,000 words per 24 hours.

Features:

  • This free grammar checker provides a proofreading service for students.
  • Essay editing service.
  • Proofread for corporate material.
  • Grammar check for document editing.
  • Manual and brochure Proofreading


5) Linguix

Linguix AI-based writing assistant is a grammar checker tool which helps you to check real time grammar errors. This is one of the best grammar and punctuation checker tool that provide alerts and recommendations.

It allows you to copy-paste your existing text and it also provides alternative words and phrases and spelling corrections and eliminating poor phrase and sentence structures and typos.

Features:

  • Real time Spelling and grammar corrections
  • Suggest forgotten punctuation mistakes
  • Master your style
  • Corrects your mistakes and gives Writing advice
  • Offers Chrome browser extension
  • Provide performance statistics
  • Context-appropriate recommendations


6) Qordoba

Qordoba is an AI writing assistant tool for businesses. This grammar check app enables you to customize writing guidelines to your unique brand and write with the same style, terminology, and brand voice.

Features:

  • Up to 200 custom terms,
  • Chrome extension
  • Provide content security
  • Standard writing guidelines
  • Plain language
  • Grammar and spelling


7) Slick Write:

Slick write is grammar checker app which highlight mistakes made in your paragraphs such as redundant sentences, passive voice, adverbs, and common starting words, repeated words, etc.

This is a grammar checker free tool also offers multiple integrated options. When you select a word, a pop-up appears at the bottom where you can find associate words and the thesaurus or the dictionary definition.

Features:

  • Free grammar checker tool that display key Statistics
  • Prepositional Phrase Index
  • This sentence quality checker allows you to check Readability Index
  • The flow of your content structure, sentence length, and word length

Visit Link: https://www.slickwrite.com/#! home


8) After The Deadline

After the Deadline is a free-to-use grammar and spellcheck application for the web. This grammar checker tool helps you to detect errors and provides smart suggestions for your content.

Features:

  • Advanced style checking
  • Contextual spelling check
  • Misused words detecting
  • Grammar checking software
  • Errors explanation tips

Visit Link: https://www.afterthedeadline.com/


9) Hemmingway:

The Hemmingway editor was designed in such a way that it is less concerned about spelling and punctuation. The tool put more empathize on readability. This grammar checks free tool targets lengthy sentences, wrong use of adverbs, and complicated words.

Features:

  • Clean and easy-to-use interface
  • Does not require an internet connection
  • Helps you if you want to break your large size sentences into small part to make it more readable.
  • This grammar checker tool Improves readability for the average user
  • Suggestions and pointers are detailed

Visit Link: http://www.hemingwayapp.com


10) Writefull

Writefull helps you to improve the quality and consistency of your writing. This tool provides quick feedback on your writing by checking your text against large databases of languages such as Google Books, Google Scholar, Google News, etc.

Features:

  • Allows you to hear text pronounced
  • Find out common words used in the article
  • Review synonyms of a given word
  • This best grammar checker (free) tool helps you to translate your text into the English language

Visit Link: https://www.writefull.com/


11) Virtual Writing

Virtual Writing is one of the best grammar checker online tool widely used by bloggers, writers, and other professionals in the blog post. This app provides spelling, grammar, punctuation, paraphrase, and vocabulary checking facility. It also offers a word count feature that shows the number of words in an essay, article, or any other content.

Features:

  • Checks and enrich vocabulary
  • Clichés and power words
  • Field-related vocabulary
  • Target structures
  • Grammar error correction/detection games

Visit Link: https://virtualwritingtutor.com/


12) Online Correction

OnlineCorrection.com is one the best grammar checker online tool that allows you to search and highlights spelling errors. This online grammer check tool also highlights many grammar and style-related mistake.

Features:

  • This best free grammar checker tool helps you to checks Grammar and spelling errors
  • Stylistic hints
  • This best grammar checker helps you to check stylistic issues
  • Auto-correction
  • You can review suggestions for sentence construction and vocabulary
  • Supports English dialects

Visit Link: https://www.onlinecorrection.com/


13) Druide Antidote

Antidote is a powerful French and English language grammar checker online tool. This grammar correction software offers error analysis, grammar diagnostics, an online dictionary, and much more. You can run this tool, either standalone or with Microsoft Word.

Features:

  • Advanced corrector with smart filters
  • Multiple dictionaries with powerful search tools
  • Clear and detailed language guides
  • Punctuation: Excessive or missing comma
  • One-click correction of all typographical errors
  • This is a best grammar checker online tool which provide detailed syntactic analysis of sentences
  • Allows you to display bold, italic, and emojis

Visit Link: https://www.antidote.info/en/buy


14) PaperRater

PaperRater software offers grammar, spelling, and action check. This one of the best comma checker tool that also provides a feature of a plagiarism checker.

However, in a free plan, you will only be able to know what percentage of your text is copied. However, it does not display an actual line of text.

Features:

  • Grammar & spelling check
  • Plagiarism check Integrated into a proofreader
  • Provides ad-free results
  • Accurate writing suggestions provided by this best grammar checker tool.

Visit Link: https://www.paperrater.com/


15) Grammar Check:

GrammarCheck is a web-hosted and free grammar checker app that has functions that help you to write their content more effectively and flawlessly. You can check your text by directly type or copy-paste a write-up into a given dialog box.

Features:

  • Basic grammar and spelling checking
  • Common active and passive voice checker
  • Web-hosted and easy to access anytime and anywhere
  • Easy-to-use via simple copy-pasting of content
  • Display info about the capitalization, punctuation, and spelling rules

Visit Link: https://www.grammarcheck.net/editor/


16) Ginger Software

The Ginger Grammar Checker allows you to write better English. It is one of the best free grammar checker software that works on uses patent-pending technology that will enable you to correct grammar mistakes, spelling, and misused word mistakes.

Features:

  • Allows contextual spelling correction
  • Correct Grammar mistakes regarding subject, verb, and agreement
  • Misused words correction
  • Correct written texts with ease

Visit Link: https://www.gingersoftware.com/grammarcheck


17) Grammar Slammer

Grammar Slammer is a spell checker and a punctuation checker tool. It is an ideal tool for everyone who uses English as a second language. It offers good insights with proposed corrections accompanied by explanations.

Features:

  • No monthly subscription required
  • Spell and grammar check
  • One-click answers
  • Supports Microsoft word macros

Link: http://englishplus.com/grammar/


18) Language Tool

LanguageTool is a grammar checker tool that offers spell and grammar checking. This open source grammar checker software allows users to find and fix grammatical and stylistic issues in their articles or text. You will also enable or disable rules in the language tool app.

Features:

  • It is one of the best free grammar checking tools which offers personal Dictionary
  • Stand-Alone App for desktop
  • Grammar, Spelling, and style Check
  • Suggested correction
  • Keyboard shortcuts
  • It supports multiple languages like English, French, German, Polish, and Russian.

Link: https://languagetool.org/


19) Reverso

Reverso is a website for online translation aids and language services. This software to check grammar includes online dictionaries, multilingual concordances, spell checking, and conjugation tools.

Features:

  • Instant Translation up to 11 languages.
  • Indexes of millions of words.
  • Examples of use in context.
  • Option to view reverse translations.
  • Frequency details.
  • Definitions or conjugations.
  • Supported platforms: iOS, Android, web.

Link: https://www.reverso.net/spell-checker/english-spelling-grammar/


20) Scribens

Scriben is an useful paragraph checker tool which allows you to correct more than 250 types of common writing and spelling mistakes. This of the best grammar software that helps you to resolve the common grammatical errors of verbs, nouns, pronouns, prepositions, punctuation, and typography corrections.

This is one of the best grammar checker app that checks the Grammar of your texts and finds spelling mistakes.

Features:

  • A powerful, free English grammar checker
  • Useful Writing And Style Tools
  • Extensions & API
  • Offers Writing and Styling Tools
  • Detects repetitions, redundancies and suggests synonyms
  • Easy User Interface

Link: https://www.scribens.com/mobile.html


21) SpellCheckPlus

SpellCheckPlus is a web-based spelling and grammar checker ideal for students who use English as their second language. This is one of the best passive voice checker tool which is defined as both student and teacher-friendly. This free grammar checker seeks to aid students in identifying errors in their Writing.

Features:

  • Text archiving or writing portfolio
  • Process-based learning
  • Punctuation checker and capitalization
  • Grammar and spelling errors
  • Grammar explanations
  • Interactive grammar exercises and active voice checker
  • Full-screen editor
  • Commonly confused words

Link: https://spellcheckplus.com/en/


22) Outwrite

Outright is a cloud-based best grammar checker solution for small businesses. This grammar check tool allows you to manage sales and expenses, calculate taxes, and facilitate electronic payments.

Features:

  • It is one of the best grammar checker free tool.
  • This is the best grammar and It helps you to correct spelling, Grammar, and punctuation errors.
  • You can meet your desired word count with customized suggestions.
  • Write compelling sentences by using a more active voice.
  • This is one the best grammar checker free app which helps you to track readability and grade level scores in real-time.
  • Enhance your vocabulary with stronger synonyms.

Link: https://www.outwrite.com/


23) NOUNPLUS

NOUNPLUS is one of the best grammar and punctuation checker tool, which helps you find typo mistakes and grammatical errors. This open source grammar checker software allows you to find the most crucial and hidden errors in your writing.

Features:

  • Helps you to explore a different way to phrase your text
  • You can list to your written text, read it back to you.
  • This is one of the best grammar check tool helps you to improve your English

Link: https://www.nounplus.net/


24) Virtual Writing Tutor

Virtual Writing Tutor is an Ideal passive voice checker tool for writers for whom whose English-as-a-second-language. This is the best grammar checker free program can also be used by bloggers, writers, and various other professionals.

This is one of the best free online grammar checker’s provides students with learning opportunities, especially when teachers are not available.

Features:

  • Field-Related Vocabulary
  • Clinches And Power Words
  • Helps you to check academic And Conversational writing Vocabulary
  • Check plagiarism
  • Help you to create Outlines For Essays
  • Grammar Checking API Service

Link: https://virtualwritingtutor.com/

Buying Guide:

❓ What is Grammar checker software?

A grammar checker software checks your writing for grammatical mistakes, punctuation, misspellings, and sentence structure issues. Some programs also evaluate tone, style, and syntax to ensure your writing is flawless.

⚡ How grammar checker works?

A grammar checker tool helps you find each sentence in a text and look up each word in the Dictionary. They can parse the sentence into a form that matches the grammar using various rules and algorithms to detect multiple errors, like agreement in tense, number, word order, etc.

🏅 How to set grammar checker plugin in word?

Grammar checking tools such as Grammarly or ProWritingAid offers their users the ability to install separate MS-word plugin extension. Once you install the plugin it will checks for mistake in grammar as you type in word. This will help you eliminate the grammatical mistakes without using the browser.

❗ What are the benefits of Grammar checker software?

Here are the benefits of Grammar checker Software:

  • Saving editing time by having the program proofread your work first.
  • Helps you to improve readability, so writing appeals to the intended audience.
  • Learning better Grammar by paying attention to suggested corrections.
  • Improving your writing skills by learning from and correcting your mistakes.
  • Helps you to avoid plagiarism as it also correct plagiarism mistakes.

💻 How can I check my grammar online?

There are many grammar checker tools that allow you to check your grammar online. All you need to do is visit their official website.

Copy and paste your text to be examined into the selected area and enjoy a basic grammar check. The checker will highlight your mistakes and offer their suggested corrections.

👉 Does grammar checker software allow a personal dictionary?

Some grammar checker tools like Autocrit, Grammarly, and Prowriting aid offer personal Dictionary. However, all the grammar check tool does not provide that option.

🔒 Is it safe to check Grammar online?

Most Grammar checkers comply with data privacy laws. They have strict privacy policies as well as checks and balances to ensure employees do not have access to the content you create. You can anytime delete the content stored on their servers.

🚀 Which are the Best Grammar Checker Software?

Following are some of the best grammar checker software:

  • ProWritingAid
  • Grammarly
  • WhiteSmoke
  • Scribendi
  • Linguix
  • Qordoba
  • Hemmingway
  • Writefull