The World’s Best Online Proofreader

Grammarly’s online proofreader automatically detects grammar, spelling, punctuation, word choice and style mistakes in your writing.
“Grammarly quickly and easily makes your writing better.”


Grammarly Product Demo

Proofread Any Text

Instantly find and correct over 400 types of grammatical mistakes.

Works Anywhere You Write Online

Detect plagiarism from 16 billion web pages and ProQuest's databases.

Proofreading For Plagiarism

Improve word choice with context-optimized vocabulary suggestions.

Proofread Your Writing Online With Grammarly

Proofread For 400+ Points of Grammar

Grammarly’s online proofreader adapts to whether you need to proofread an academic paper, a business cover letter, a casual email, or even a novel.

Proofread Your Word Usage

Proofread for word repetition and enhance your vocabulary with context-optimized synonyms. Our algorithms take into account the frequency and context of your word usage so we can suggest the best alternative word that will help you communicate more clearly.

Contextual Proofreading For Spelling

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.

Over 4 million people already use Grammarly to proofread their writing online.

Whether your writing is read by thousands of people online, or simply by close family and friends, checking your grammar is important. Business professionals, bloggers, students, and even professional writers use Grammarly to proofread their writing, so why shouldn't you?