The World’s Best Online Proofreader

Grammarly’s online proofreader automatically proofreads your text for grammar, spelling, punctuation, word choice and style mistakes.

  • Plagiarism detector

    Instantly proofread your text for over
    250 types of grammatical mistakes
  • Context-optimized vocabulary suggestions

    Proofread for word repetition and enhance your vocabulary with context-optimized synonyms
  • Instant proofreading

    Proofread for plagiarism by checking your texts against over 8 billion web pages

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Checking for: Preposition use at the end of sentences

For years, I have been driving an old used car with a lot of mileage, and I hate it. It gets me where I need to go, but I’m tired of constantly fixing leaks and broken parts all the time. Its annoying every time I need to take it to the mechanic. Even when they take care of everything, I know I’ll just end up going back there in a few weeks. I have finally decided that I am not going to do it anymore. I have decided to buy a new car! Unfortunately, I have a problem. I have no idea what car to get. Do I want something fast? Do I want something big? Do I want something stylish? Something economical? I have so many choices that I don’t even know where to begin. I am not sure if I will be able to make the decision on my own. I don't have a lot of money, either, so I probably don’t have many options. After I did some research, I knew that I would need some expert advice. Eventually, I went to a local dealership to check out some new models. I talked to the saleswoman and listened at her carefully. Her honesty and professionalism were really impressive. She had a lot of helpful suggestions and showed myself some safe affordable choices. After a long discussion, I finally decided which one I wanted. She not only helped me with the paperwork and finished the sale, but also the insurance. I was expecting this purchase to be a serious hassle, but the experience was almost painless. Everything went smoothly, and now I have a brand new car!I was so excited when I pulled out of the lot that the first thing I did was change lanes right in front of other car. “That wasn’t very nice,” I thought to myself. I needed to relax. I didn’t realize what a serious mistake I had made however. I hadn’t just cut off any other car, I had cut off a police car! It took a few seconds to realize what was happening when I saw the flashing lights in my rearview mirror. By the time I had managed to pull over, my heart was racing. I gathered all the paperwork as he approached my window. “You forgot to signal back there,” said Officer Johnson, according to his nametag. “Yes, well, it’s a new car so I guess I was a bit unfamiliar with the controls,” I stammered. He looked at me skeptically. “I’m pretty sure the controls for the turn signal are in the same place on every car.” What could I say? He was right. “I’m sorry,” I ventured. He looked over my paperwork and saw that the car was new. “It would be unfortunate to get a ticket on your first day in a new vehicle,” he said, smiling. “Try not to cut in front of anyone on your way home.” I had never felt so relieved in my life. “Thank you, officer!” As he made his way back to his car I let out a huge sigh. I took a few seconds to compose myself before shifting into gear and driving away from the side of the rode. Now I have a brand new car and a story to tell!
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Grammarly’s online proofreader provides another set of eyes to help perfect your writing. Using patent-pending proofreading technology, Grammarly reviews and improves your text, correcting grammar, spelling, word choice, and style errors with unmatched accuracy. Best of all, Grammarly proofreads your text in seconds!

Proofread For Over 250 Points of Grammar

Faster than any human proofreader, Grammarly’s online proofreading tool scans your text for more than 250 advanced grammar rules. Grammarly proofreads for subject-verb agreement, article use, modifier placement, and more! Throw out those clunky proofreading handbooks and let Grammarly take care of the rest. Our online proofreader is fast, accurate, and accessible anywhere.

Proofread Any Text

Different styles of writing require different styles of proofreading. Grammarly’s proofreading technology adapts to your writing needs. Whether you need to proofread an academic paper, a business cover letter, a casual email, or even a novel, Grammarly can handle it.

Teachers and Students
Proofread term papers, essays, and other assignments
Proofead correspondence and other business documents
Job Seekers
Proofread cover letters, resumes, and thank-you notes
Professional Writers
Proofread fiction, ghostwriting, blog posts, and more
ESL Students
Proofread text and improve your writing skills
Technical Writers
Proofread reports, medical documents, and white papers

Josh Cain Editorial Intern
San Francisco, USA

“Targeting students and professionals has turned Grammarly into the most popular, paid proofreader on the Web.”

Garrett Moon Blogger
North Dakota, USA

“[Grammarly] is by far the most robust online proofreading service that I have ever found, and definitely worth the price of admission.”

Shavon Ford College Counselor
New Jersey, USA

“@grammarly is the best! Just found out about it and paid for a subscription to learn all the things I didn’t in "Grammar School"”

Context Optimized Synonyms

Unlike other automated proofreaders, Grammarly enhances your text by suggesting alternate word choices. Using sophistacted context optimization software, Grammarly generates synonyms while it proofreads to help you avoid needless repetition and flat, featureless language.

Adaptive Spell Checker

Even the most eagle-eyed proofreader sometimes misses a mistake, especially misspelled words or commonly confused word pairs such as lose/loose and affect/effect. Grammarly’s automated proofreader spots words that are spelled correctly but used in the wrong context.

Proofreading For
Plagiarism & Correct Citations

In addition to proofreading for grammar and spelling mistakes, Grammarly’s super-charged online proofreader also checks your text for plagiarism. If Grammarly detects copied content, it generates citations in the three most popular formats (MLA, APA, and Chicago) to help you correct the issue.

Find Errors That Microsoft® Word Can’t

Grammatical mistakes that go unnoticed by other proofreading programs can’t slip past Grammarly. Our proofreader catches up to 10 times more mistakes than Microsoft Word. Here are some examples:

Review this sentence for comma use.

Review this sentence for commonly confused words. Ensure you do not confuse similar words with different meaning. Suggested correction: The philosopher did not speak aloud often.

Contextual Spelling
The philosopher did not speak allowed often.

Review this sentence for commonly confused words.

Ensure you do not confuse similar words with different meaning.

Suggested correction:

The philosopher did not speak aloud often.

Presenting your ideas effectively improves communication.

Review this sentence for squinting modifiers.

It may be unclear what the modifier “effectively” is defining in this sentence. Make sure it is clear which word or phrase is being defined.

Be careful for the ice, the steps are slippery!

Review this sentence for preposition misuse.

Your sentence may use “for” after “to be careful”. Please re-read your sentence and ensure you have used the correct preposition.

“Let’s go outside” said the boy.

Review this sentence for comma use.

Ensure there is a comma between direct quotes and the attributive tag. The attributive tag, (“said”), should be separated from the quote by a comma; consider inserting one.

Do you want more or less apples?

Review this sentence for quantifier usage.

The quantifier “less” may not be appropriate for the noun which it modifies. Clearly identify the noun as countable or uncountable, and consider changing the quantifier, as appropriate.

Grammarly on the Go!

As a web-based application, Grammarly’s online proofreader is available from any browser. For offline proofreading, Grammarly integrates seamlessly with the Microsoft® Office Suite, including Word and Outlook.

Improved Skills

Grammarly’s proofreading tool identifies your most common mistakes and helps you understand how to avoid them. By tracking your progress, Grammarly’s online proofreader shows you how much you’ve improved.

Lightning Fast

Grammarly’s online proofreader checks your text in seconds, highlighting errors and explaining tricky grammar rules. Use Grammarly to proofread emails or even entire novels faster than the speediest editor.

Incredible Customer Service

We’re all grammar geeks at Grammarly, and we love to talk to our users about their experience with our products. If you have any questions or comments, our customer service team is standing by 24/7.

Grammarly isn’t just an online proofreader; it’s also your personal writing coach.
As it proofreads your text for grammatical errors, Grammarly also recommends
improvements in style and mechanics to strengthen your writing.

Start Proofreading Now!

Online Proofreader

Grammarly’s online proofreading software provides a suite of features that will help you proofread, edit, and improve your writing, whether you are a student, a professional or somewhere in between. The proofreading program also checks your writing for plagiarism, scans for grammatical errors, and performs a word usage and spelling check. The Grammarly proofreader is a comprehensive solution for writers looking to improve.

Additionally, Grammarly’s proofreading software checks spelling and much more. The Grammarly editing tool not only helps you locate misspelled words in your writing, but also helps you to identify the correctly spelled words that you have used incorrectly. This enables you to use words that make an impact. Liven up your sentences and improve readability with context-optimized word choice suggestions.

Finally, when additional feedback is needed for editing, Grammarly offers additional, free resources for you.

Questions can be posted, via each error card, directly on Grammarly Answers, Grammarly’s Q&A site for discussion of grammar and writing. Additionally, further explanation for grammar and writing rules can be found in the Grammarly Handbook.

Grammarly’s online proofreading software helps you improve your writing beyond grammar and spelling. This proofreader is an educational tool for understanding what to improve in your writing and how to improve it.