More than a grammar checker. Intentional writing edits.
From Grammar to Content: Get actionable next steps
To help you write more effectively, our intelligent system catches everything from grammar slips to muddled arguments. Get actionable suggestions for the problems and mistakes found in your document.
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Our 3-step process to improve writing,
and preserve learning
A refined three-step process to transform your documents into polished, professional work.
Learn from expert content feedback
Our tool delivers content feedback with editorial precision. Every recommendation is anchored to the exact sentence that needs improvement, providing specific guidance for enhancement.
Fix clarity and writing precision
When a sentence is wordy, unclear, or lacks punch, our feedback tool pinpoints the exact location and shows you how to refine it. Our targeted feedback sharpens your message, enhances readability, and tightens your arguments.
Double check for perfect grammar
Our grammar engine functions like a line-by-line proofreader, analyzing each sentence's unique context to catch errors. We flag misplaced commas, awkward clauses, and inconsistent usage, and offer corrections right where they occur.
Want focused feedback? Highlight and ask for more.
Sometimes you need focused feedback on specific sections of your text. Our document editor includes a built-in chat feature where you can highlight any sentence and ask follow-up questions. It’s instant support where you need it most.
Try todayHow does our AI grammar check work?
Enter text into GPTZero and scan for writing feedback.
Simply copy and paste text or upload a file and get AI-powered feedback, catching punctuation slips, spelling errors, and more.
Accept or reject suggestions
Fix grammar mistakes and avoid common typos with easy writing improvement suggestions.
Improve writing beyond basic grammar corrector
Get custom feedback on voice, tone, and sentence structure from AI trained for your content type (applications, marketing, essays)
Who uses our AI grammar checker?
Writers, Students, and Authors
Polish your writing, improve your fluency, develop an original and compelling voice.
Educators and Academic Institutions
Offer AI writing tools that help teach students why and how to improve, versus rewriting everything for them.
Marketers and Content Creators
Save time with editing and rewriting with our custom feedback and AI copywriting.
Trusted by educators.
Kristina McElheran
Assistant Professor of Economics,
University of Toronto
"GPTZero’s feedback aligns well with my sense of what is going on in the writing - almost line-for-line."
Randi Weingarten
President,
American Federation of Teachers
"This tool is a magnifying glass to help teachers get a closer look behind the scenes of a document, ultimately creating a better exchange of ideas that can help kids learn and get excited about school when AI is used appropriately."
Justin Curl
J.D. Candidate,
Harvard Law School
"I'm a huge fan of the writing reports that let me verify my documents are human-written. The writing video, in particular, is a great way to visualize the writing process!"
AI Text Detection and Analysis Trusted by Leading Organizations
INTEGRATIONS
Built-in AI detection for
classrooms and workspaces
Bring the most precise AI content checker directly into
the software you use every day.
FAQs about our Grammar Checker
Everything you need to know about our Grammar Checker.
Can’t find an answer? You can talk to our customer service team.
How do online grammar checkers work?
Online grammar checkers work by scanning sentences and detecting errors in spelling, punctuation, and phrasing based on sets of rules in the English languages programmed into the software. GPTZero’s grammar checker takes the most up to date English grammar rules and combines them with AI trained on top educational composition and writing instructions to improve your writing.
How does GPTZero’s grammar checker work?
GPTZero’s grammar checker uses AI to scan your text for spelling errors, missing punctuation, and typos. It then provides suggestions on how to improve your writing. GPTZero’s grammar checker is free to use and doesn’t require a subscription.
How can I check if my sentence is correct or not?
To check if your sentence is correct, run it through a free grammar checker like GPTZero. GPTZero’s AI grammar checker will detect common spelling mistakes, punctuation errors, typos, and grammar problems and let you automatically correct your writing.
How can we improve writing skills?
Improving your writing is more than just making sure it’s typo free. GPTZero’s writing feedback and improvement tools are more than a basic sentence checker. It will teach you writing best practices and writing tips, from writing more concisely to avoiding negative construction and more. GPTZero’s AI writing tools help you rephrase and rewrite your sentences for better readability and fluency.
Are there better alternatives to Grammarly’s grammar checker?
Alternatives to Grammarly’s grammar checker include: GPTZero’s writing feedback tools and Quillbot’s AI writing tools. We obviously think there’s value to trying GPTZero, as the leading AI detector, to not just fix grammar mistakes but improve your writing and avoid sounding like an AI chatbot.