Free AI Grammar Checker and Corrector

Our best-in-class, patented, AI-enabled Grammar & Spell Checker is available for free. Enhance your text by using the top-rated tool for checking Grammar & Spelling.

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Trusted by Industry Leaders

Harvard UniversityThe GuardianThe New York TimesFlippaMotion InvestSurferDotdash meredithGDDiggity MarketingWriteraccessGMAlibaba.comWalmartAT&TAAReutersBusiness InsiderNeil Patel

Communicate with Clarity and Professionalism

Are You Catching Grammar and Spelling Errors in Your Content?

Use Originality.ai’s Free AI Grammar Checker to boost efficiency in your editorial process.

Power Grammar and Spell-checking With AI

Upgrade your publication process with a user-friendly interface for grammar and spell-checking. Rapidly highlight grammar and spelling issues with our intuitive design. Built for ease of use and accessibility on any device.

Sign up now   ›

Benefits of Our AI Grammar and Spelling Checker For Editors and Publishers

  • Easily spot grammar and spelling issues with clear highlights in the text editor.
  • Refine copy and ‘Fix issues,’ with 1 click.
  • Review a scorecard to identify how many grammar and spelling issues are in your content.
  • Access an easy-to-use, reliable, and scalable Grammar and Spelling API that you can integrate into your apps.
  • Say goodbye to common grammar, spelling, and punctuation errors:
    Fix typos (tidy copy by removing spelling mistakes)
Correct punctuation (think commas and semicolons)
Address grammar mistakes (think they’re vs. their)
And more!

Patented Best-in-Class Editing Tools

Originality.ai is Built For…

Marketers, Writers & Publishers 

Marketers, Writers & Publishers

Teachers & Students

Teachers & Students

  • Uphold integrity and transparency across: assignments, essays, coursework, papers
  • Moodle Plugin: easily check for AI content and plagiarism in Moodle LMS
  • Peace of mind for students with a Free Chrome Extension to ‘Watch a Writer Write’
  • Deep Scan: See why text is flagged as AI + how to ethically edit it, so your work is identified as original (not AI)!
Agencies & Enterprise

Agencies & Enterprise

  • Manage client & writer expectations for AI use
  • Integrate a process for AI detection, plagiarism checking, and factual accuracy at scale
  • Streamline editorial processes across teams with team management and report sharing

How to use Originality.ai

Paste or Upload Text

Step 1

Paste or Upload Text

Login to Originality.ai and paste your text into the editor. You may also upload a PDF or enter a URL for scanning.

Select Scan Types

Step 2

Select Scan Types

Select your desired scan types like AI, Plagiarism, Content Optimization, Readability, Grammar OR Fact checker to scan your text against.

Click Scan

Step 3

Click Scan

Click on the Scan button and get scores for each scan types with detailed explanations and sentence highlights wherever applicable.

Customers love Originality.ai

Sam Saltis

Sam Saltis

Originality is a great tool for detecting AI content. The product has been invaluable for our content marketing team. Fernanda and the team are always very responsive and helpful. Highly recommend this product.

Miguel Maloney Thompson

Miguel Maloney Thompson

I have the opportunity to make sure that my writing is plagiarism-free, and with a lot of AI-generated content around, I can ensure my writing does not get flagged as just another to the bunch.

I do technical writing where there are only so many ways to describe concepts and ideas. However, Originality.ai gives me the opportunity to personalize my writing even more, which is an advantage. With some time, I can give my content a sense of uniqueness.

John Kohn

John Kohn

Reliable and trustworthy. Originality is always so quick to respond to my questions and lend a helping hand. It’s a very good tool for detecting ChatGPT use on academic papers, especially with the "view writing" feature which shows the text being typed by the student as they were typing it.

Stevie Lambert

Stevie Lambert

AI is accurate compared to free choices and the support staff like Ellie are very helpful. The interface is easy to use and shows a % chance of the work being AI. It’s also, nice that it shows what parts may be AI or not.

Aptidus

Aptidus

The service provided is exceptional, offering the most accurate and reliable AI detector available on the market. The customer support team is exceptionally responsive.

Gbas gbos

Gbas gbos

Originality's AI checker and plagiarism detector are absolutely phenomenal—by far the best I have used (yes, I used all of Winston, GPT zero, etc.). The Turbo model is CRAZY good! 

Vivek Pandey

Vivek Pandey

There are lots of similar AI detection tools available online but nothing comes even close to what they offer. I can't trust any other tools other than theirs. Have tried maybe 20-30 other websites and settled with them.

Yanmin Wang

Yanmin Wang

I had an excellent experience with the support team at Originality.ai. They were incredibly responsive and provided clear, detailed answers to all my questions. The explanations were thorough, and I now have a much better understanding of how the platform works and how my content is handled. 

The team was patient and professional and went above and beyond to ensure all my concerns were addressed. I truly appreciate their help and the top-notch customer service they provide. Highly recommended!

Canadian Law Student

Canadian Law Student

Originality.ai is the best tool on the market. I have used comparable services and this one is exceptional. It provides an accurate report with a match score which really helps writers/researchers adjust and improve their work. 

There are also advanced features such as paraphrase detection which are not available with any other comparable service. The features provided by Originality.ai are exceptional for users who want to avoid plagiarism and also improve their research process. I hope to continue using Originality.ai for many years to come.

John Willsdon

John Willsdon

This is a really helpful tool. Certainly the best of the AI detectors I tried. What makes it great is that you also get a bunch of other tools that are really helpful. The fact checker is awesome, it gives you feedback on whether or not points in your essay are factual or not by reading the source material in your citations.

Todd

Todd

I have been using this tool since the start! And it has saved me many times. Many times when checking clients' sites the problem was AI content or plagiarism.

Chris Swanson

Chris Swanson

When I hire writers, I want 100% human-written content. I depend upon Originality.ai to check this for me.

Dirk Berger

Dirk Berger

Originality.ai saved me from making a big mistake. I have written a book with the help of ChatGPT, 40% of my work is AI; 60% is human. It identified the AI, and now I am writing it all by myself. 88-100% human. Thank you Originality.ai.

Rob McTavish

Rob McTavish

I started to look for an easy tool to confirm my suspicions over some of the material being submitted by my students in first-year Communication courses. I found Originality.ai and tried it out. It worked so well that I actually tested it out with some material I created using AI as an example and sure enough, it perfectly determined which was my work, what was totally AI-written, and what was edited AI material.

Andrew Stevenson

Andrew Stevenson

Originality.ai has been remarkable in its ability to detect AI content. The customer service is also incredible in how thorough and responsive they are. Highly recommend this program.

Pieter Steenkamp

Pieter Steenkamp

I found Originality.ai to be the best AI detector. I use it for my student's assignments and recommend it to my colleagues.

JC Playz

JC Playz

Originality really lives up to the expectations, it's super reliable and has the best detector for AI. Now I can understand why so many people use it such as professionals.

Trish McLean

Trish McLean

Incredible experience. Excellent product. Very easy to use, thorough and informative. Brady was incredibly helpful on the chat. He carefully checked my document to see why it had a high score for AI and then explained it to me. He provided individualized advice on how to move forward. Excellent! Thank you Brady.

Joseph Bereber

Joseph Bereber

Customer service is top-notch. Not only are they super accommodating, they are also super helpful. The tools on Originality.ai are also incredibly accurate and very useful. I've had nothing but positive experiences using this service.

Peter Stuart

Peter Stuart

Originality.ai is by far the best AI detector tool. We have used other tools to detect AI in content but we have found that Originality.ai is by far the most accurate. This, combined with flexible payment plans to suit individual requirements and sharp customer support. Originality.ai is a no-brainer if you are looking for an AI detection solution.

In the Press

Featured by Leading Publications

Harvard UniversityThe GuardianThe New York TimesFlippaMotion InvestSurferDotdash meredithGDDiggity MarketingWriteraccessGMAlibaba.comWalmartAT&TAAReutersBusiness InsiderNeil Patel
CNN

Jennifer Korn

How companies are embracing generative AI for employees…or not

Many prominent companies have entirely blocked internal ChatGPT use, including JPMorgan Chase, Northrup Grumman, Apple, Verizon, Spotify and Accenture, according to AI content detector Originality.AI, with several citing privacy and security concerns.

Read the story ›
Politico

Ben Schreckinger

AI vs. public opinion

Originality.ai, a site that provides detection services for AI-generated content and plagiarism, published a convenient tracker that lists the 10 pending lawsuits against OpenAI and ChatGPT.

Read the story ›
The Guardian

Betsy Reed

Mushroom pickers urged to avoid foraging books on Amazon that appear to be written by AI

Four samples from the books were examined for the Guardian by Originality.ai, a US firm that detects AI content.

Read the story ›
The New York times

Steven Lee Myers & Tiffany Hsu

Another Side of the A.I. Boom: Detecting What A.I. Makes

More than a dozen companies have popped up to offer services aimed at identifying whether photos, text and videos are made by humans or machines.

Read the story ›
Financial Times

Generative AI: hype not hyperintelligence is lifting values

Generative artificial intelligence could produce magic in the sky, says Sam Altman founder of pioneering start-up OpenAI. Successful entrepreneurs are entitled to make visionary statements.

Read the story ›
Axios

Sara Fischer

Major websites are blocking AI crawlers from accessing their content

Nearly 20% of the top 1000 websites in the world are blocking crawler bots that gather web data for AI services, according to new data from Originality.AI, an AI content detector.

Read the story ›
Nature

Andrea Taloni, Vincenzo Scorcia, and Giuseppe Giannaccare

Modern threats in academia: evaluating plagiarism and artificial intelligence detection scores of ChatGPT

Plagiarism and research integrity are sensitive issues in the academic setting, especially after the recent offspring of artificial intelligence (AI) and large language models (LLMs) such as GPT-4.0 [1].

Read the story ›
Digiday

Sara Guaglione

Why publishers are questioning the effectiveness of blocking AI web crawlers

A number of publishers — including Bloomberg and The New York Times — were quick to block OpenAI’s web crawler from accessing their sites, to protect their content from getting scraped and used to feed the artificial intelligence tech company’s large language models (LLMs).

Read the story ›

Frequently Asked Questions

How does the Originality.ai Free AI Grammar Checker work?

Many free grammar and spell checkers were designed before generative AI was released. The Originality.ai Grammar Checker is powered by AI, providing it with the unique functionality to fix grammar and spelling issues throughout your text with 1 click. 
To try it out, click ‘Fix issues’ at the bottom of the text editor. Fixing grammar and spelling issues with this feature will retain the intent of your copy. 
‍Note: Using the ‘Fix issues’ feature may increase the AI score of the text.

Is there a limit to using the Free AI Grammar and Spell Checker?

You can review up to 2,000 words for grammar and spelling issues per scan. If you’d like to scan longer sections of text, sign up to enjoy the full version.

Does the Originality.ai AI Grammar Checker evaluate readability, too?

The Free AI Grammar Checker tool only scans for grammar and spelling errors. To analyze the readability of your text, use our Readability Checker or sign up to streamline your workflow and scan for grammar, spelling, and readability at the same time.

Does the Originality.ai AI Grammar Checker highlight AI-generated text?

The Free AI Grammar Checker reviews text for grammar and spelling issues. If you’re interested in checking for AI-generated text, check out the AI Checker or sign up to access the Site Scanner and review potential instances of AI content across your website in just 1 click.

Is the Free AI Grammar Checker multilingual?

Currently, the AI Grammar Checker analyzes text for grammar and spelling issues in United States English. However, if you’re looking to scan copy for AI-generated text, you can sign up to access Multi-Language AI Detection.

What does this Free Grammar Checker fix?

Correct typos, grammar, spelling, punctuation, and more! Communicate professionally and publish exceptional copy with confidence.
Issues the Originality.ai Free AI Grammar Checker corrects:

  • Spelling
  • Grammar 
  • Punctuation
  • Capitalization
  • Subject-verb agreement
  • Incorrect contractions
  • Word misuse or word choice
  • Comma splices
  • Singular vs. plural nouns
  • Consecutive nouns
  • Possessive nouns
  • Unnecessary prepositions



What does that mean for your copy? Say goodbye to common typos (correct spelling mistakes), use commas and semicolons correctly (fix punctuation), and avoid common errors like using its instead of it’s (correct grammatical issues).