Free Grammar Checker Online

Nothing makes you lose credibility faster than a grammar mistake. Feel confident in everything you write with ProWritingAid’s best grammar checker.

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Feel more confident in everything you write

Join over 2 million authors, students, and professionals improving their writing.

I am continually impressed with the positive input this program offers me every time I sit down to write. My skills have improved immensely since I bought it and heartily recommend it to anyone who wants to have more confidence in their own writing.

I’ve tried every free and paid writing/editing/grammar extension out there and this by far is the best one my team and I have found. It’s fast, accurate and really helps improve your writing beyond simple grammar suggestions.

ProWritingAid has been a resource in my writer toolkit for many years. The program helps me to craft and clarify my stories for a better reader experience. Your editor will thank you for making their job easier.

Edit Faster and Better

Avoid weak adjectives and verbs

Learn as You Edit

Build your writing skills with in-app suggestions, videos, explanations, and quizzes.

ProWritingAid's Readability Suggestions

20 In-Depth Writing Reports Go Beyond Grammar

Improve style, inconsistencies, awkward sentences, repetitiveness, and much more.

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Customize ProWritingAid to your needs by creating your own rules and reminders.

Works wherever you do

Get grammar suggestions across all the apps you use, whether they’re on desktop or online.

What Makes ProWritingAid the Best Grammar Checker Online?

Editing software is like your regular spell check, but with superpowers.

Comparison to Published Writing

Using artificial intelligence, the software has analyzed millions of published books and articles and discovered a wealth of information. Those professional writers know what they are doing and it’s a great way to learn.

Grammar Structures

The software is able to break down most sentences into their various parts and recognize if you are using a problematic grammatical structure or word choice. For example, if you use a plural noun followed by the singular form of a verb, a prompt will pop up suggesting a change.

Document Analysis

These suggestions are based around your text on its own. Have you consistently used US English, or have you jumped between US and UK English? Have you used the same word multiple times within the same paragraph so that it sounds repetitive and strange?

Like Microsoft Word’s spell checker, the online grammar checker shows suggestions to help you make your writing more accurate, correcting your spelling mistakes and punctuation errors as you write.

What kinds of mistakes can our grammar checker highlight?

English grammar isn’t easy, but the grammar check report will help you zero in on key embarrassing mistakes.

Spelling Errors

Spelling mistakes are highlighted red in your text when using our grammar checker. If you click the word, you’ll be shown a list of suggested corrections.

Example of spelling errors showing on our grammar checker
Example of confused words being corrected on our grammar checker

Commonly Confused and Misspelled Words

Our best grammar checker has also been programmed with a list of the most commonly confused words in the English language and will use the structure of the sentence to help you figure out when you have the wrong usage.

Grammar Errors

Grammar can be a bit of a minefield, so we highlight all potential issues in blue. Perfect grammar is hard and there are so many ways to slip up.

Do you have subject—verb agreement? Did you write "it’s" when you really meant "its"? Have you accidentally written a sentence fragment?

ProWritingAid’s grammar corrector will catch errors as you write so you can make sure no grammatical mistakes slip through.

Example of grammar errors being corrected on our grammar checker
Example of punctuation mistakes being corrected during a grammar check

Punctuation Mistakes

How many times have you been tripped up by comma splices? Or semi-colons? Or apostrophes? A good punctuation corrector will help you learn the ins and outs of punctuation rules.

ProWritingAid’s suggested changes will always be accompanied by an explanation to help you understand the rules so that you don’t make the same mistake next time.

What type of content should I grammar check?

You should check any text that will be read by someone else.

For business writers, it improves your:
  • emails
  • reports
  • pitches
  • cover letters
  • resumes
  • contracts
  • strategies
  • marketing copy
For creative writers, it improves your:
  • stories
  • articles
  • memoirs
  • blog posts
  • social posts
  • essays
For students, it improves your:
  • essays
  • lab reports
  • assignments
  • applications

ProWritingAid's Grammar Check FAQs

1. Should I use a punctuation checker too?

Yes! Punctuation acts like signposts in your writing. It helps your reader follow your ideas and understand your sentences. Punctuation checking is essential if you want your writing to be clean and clear.

ProWritingAid has punctuation checking built in so you can do everything in one place. The grammar report will highlight any pesky misused commas, missing apostrophes, and more.

2. Does editing software work as an essay checker for students?

Yes! Better writing means better grades.

Schools and universities around the world use editing software to help their students write better essays. Sloppy spelling and silly grammar mistakes lead to poor grades. A good spelling and grammar check means you will find errors before you hand your assignments in. Teachers love essays that are clean, clear, and polished.

3. How does ProWritingAid's grammar checker beat Grammarly's?

With 20 different writing reports, ProWritingAid offers a more detailed analysis of your sentences than other grammar checkers on the market, such as Grammarly's free online grammar checker.

Plus, ProWritingAid's premium package is cheaper and more affordable than Grammarly's.

4. Can I check for grammar mistakes in email? And on social media?

Yes! You can use our grammar checking browser extensions (Chrome, Safari, Firefox, and Edge) to check your writing on nearly every website out there, like Facebook, Twitter, and Medium, as well as on web-based email providers like Gmail and Yahoo.

Using the browser extensions, you’ll feel more confident that you are sharing error-free content every time you Tweet, share, or post.