Best 32 AI Grammar Checker Tools in 2026
Quillbot, Gptinf, Wordtune, Writing9, Phraslyai, Corrector App, Linguix, Writefull, Thesifyai, Instatext are the best paid / free AI Grammar Checker tools.
AI Grammar Checker is a powerful tool designed to help users refine their written communication by identifying and correcting grammatical errors with precision and ease. Whether you're drafting an email, preparing a report, or writing a research paper, this tool ensures your language is clear, professional, and free from mistakes. Its intelligent algorithms analyze sentence structure, punctuation, and word usage to provide accurate suggestions that align with natural language patterns. Beyond basic corrections, it offers insights into style, tone, and clarity, making it indispensable for students, professionals, and content creators alike. With a user-friendly interface and seamless integration into various writing platforms, AI Grammar Checker enhances productivity and confidence in written expression. It's not just about fixing errors—it's about elevating your writing to the next level, making it more impactful and polished for any audience.
QuillBot enhances your writing with AI tools for paraphrasing, grammar checking, and more.
For the latest pricing, please visit this link: https://quillbot.com/upgrade?referrer=footer
Prices are subject to change. Please visit the official website for the most up-to-date pricing information.
What is Gptinf?
Gptinf is an innovative AI tool designed to enhance the quality of professional writing by refining content to make it more human-like and readable. It serves as a comprehensive writing assistant that allows users to transform AI-generated text into polished, coherent content. With Gptinf, users can edit their drafts, check for AI detection, and ensure originality through a built-in plagiarism checker, all in one streamlined workspace. This tool is particularly beneficial for professionals, students, and content creators who seek to maintain their unique voice while improving the clarity and effectiveness of their writing.
Basic
For those looking to fix spelling and grammatical errors — for limited use only. Limited daily use: 10 Rewrites & AI suggestions, Limited monthly use: 3 AI summarizations, Unlimited: Spelling corrections, Grammar checks.
Advanced
For those looking to perfect their writing — for limited daily use. Limited daily use: 30 Rewrites & AI suggestions, Limited monthly use: 15 AI summarizations, Unlimited: AI recommendations, Spelling corrections, Grammar checks.
Unlimited
For those looking to write confidently — anywhere, anytime. Unlimited: Rewrites & AI suggestions, AI summarizations, Spelling corrections, Grammar checks, Vocabulary enhancements, Clarity improvements, Fluency increases, Premium support.
For the latest pricing, please visit this link: https://www.wordtune.com/plans
Prices are subject to change. Please visit the official website for the most up-to-date pricing information.
For the latest pricing, please visit this link: https://writing9.com/#pricing
Prices are subject to change. Please visit the official website for the most up-to-date pricing information.
What is Phrasly.AI?
Phrasly.AI is an advanced AI writing tool designed to enhance the quality and natural readability of content. It offers a unique human writing assistant that eliminates robotic patterns commonly found in AI-generated text. By utilizing proprietary models trained on real human data, Phrasly.AI helps users create authentic, engaging content that resonates with readers. Whether you're a student, professional, or content creator, Phrasly.AI aims to supercharge your writing process, making it more efficient and enjoyable.
What is Corrector App?
Corrector App is an innovative AI tool designed to help users find the best AI solutions for various tasks, including writing, coding, image generation, and much more. With a vast directory of over 22,139 AI tools categorized into 120+ groups, Corrector App serves as a comprehensive resource for discovering both free and paid AI tools. The platform is updated daily, ensuring that users have access to the latest and most effective AI tools available in the market.
Pro Plan
Plan includes: Grammar check & paraphrasing, Typing shortcuts, AI in browser.
For the latest pricing, please visit this link: https://linguix.com/pricing
Prices are subject to change. Please visit the official website for the most up-to-date pricing information.
What is Writefull?
Writefull is an advanced AI-powered[1] writing and proofreading[2] tool specifically designed for academics. It leverages state-of-the-art language models[3] trained on millions of journal articles to provide tailored language feedback, making it an invaluable resource for students, researchers, and academics alike. Writefull assists users in various aspects of academic writing[4], including paraphrasing[5], copyediting, and generating titles and abstracts. This tool aims to enhance the clarity and quality of academic texts, helping users to produce polished and professional writing.
Monthly Plan
Real Time Feedback, Article Search, Journal Finder, Conference Finder, Paper Digest, Theo's Chat, Research Opportunities.
Annual Plan
Real Time Feedback, Article Search, Journal Finder, Conference Finder, Paper Digest, Theo's Chat, Research Opportunities. Enjoy 58% OFF on the annual plan.
For the latest pricing, please visit this link: https://www.thesify.ai/pricing
Prices are subject to change. Please visit the official website for the most up-to-date pricing information.
InstaText One Premium
Powerful and unlimited editing, uninterrupted. Unlimited use, unlimited improvements a day, improve unlimited characters at once, all supported languages included, all products and features, no restrictions, InstaText browser extension: 20+ applications, InstaText for Word, early access to new features.
Free
Explore what InstaText can do for you. Limited use, 5 improvements a day, improve 1500 characters at once, no credit card required.
For the latest pricing, please visit this link: https://instatext.io/plans/
Prices are subject to change. Please visit the official website for the most up-to-date pricing information.
Free
Regular AI Models including ChatGPT, GPT 5 mini, and Gemini 3 Flash. 15 AI responses per month. Great for general tasks with quality responses. Includes browser extension, web app, voice input, file attachments, and priority support.
Pro
Regular AI Models including ChatGPT, GPT 5 mini, and Gemini 3 Flash. Advanced AI Models including ChatGPT, GPT 5.1, Gemini 3.1 Pro, and Sonnet 4.6. Unlimited usage, great for complex tasks with better quality responses. Includes browser extension, web app, voice input, file attachments, and priority support. Annual Plan at $9/month ($108 billed yearly, save $36).
Elite
Regular AI Models including ChatGPT, GPT 5 mini, and Gemini 3 Flash. Advanced AI Models including ChatGPT, GPT 5.1, Gemini 3.1 Pro, and Sonnet 4.6. Thinking AI Models including Gemini 3.1 Pro Thinking, ChatGPT, GPT 5.1 Thinking, and Sonnet 4.6 Thinking. Unlimited usage, great for reasoning tasks with the best quality responses. Includes browser extension, web app, voice input, file attachments, and priority support. Annual Plan at $14/month ($168 billed yearly, save $48).
For the latest pricing, please visit this link: https://jetwriter.ai/pricing
Prices are subject to change. Please visit the official website for the most up-to-date pricing information.
Free
Essential for individuals who want to correct spelling and grammar errors. Core features include Spelling & Grammar checking and Thesaurus.
Pro
For individuals who want to improve their writing quality and flow. Core features include Spelling & Grammar checking, Thesaurus, Style improvements, Structural suggestions, Sentence rewriting, Plagiarism checks (50/month), and Priority email support.
Teams
For groups that want to enhance their communications. Core features include Spelling & Grammar checking, Thesaurus, Style improvements, Structural suggestions, Sentence rewriting, Plagiarism checks (50/month), and Priority email support.
For the latest pricing, please visit this link: https://www.outwrite.com/pricing
Prices are subject to change. Please visit the official website for the most up-to-date pricing information.
Shyeditor enhances your writing with AI-driven tools for better creativity and productivity.
Basic
Our free plan for writers who are just getting started. Includes 20 AI Assistant credits per month, 100MB file storage, unlimited projects for individuals, intelligent writing assistance, all basic editor features, writing goals and stats, and export to txt.
Pro
Advanced features for professional writers. Everything in Basic, plus 500 AI Assistant credits per month, 5GB file storage, 12+ color themes, AI image generation, export to markdown, pdf and docx, intelligent search, personalised AI writing styles, deep research, early access to new features, and priority email support.
For the latest pricing, please visit this link: https://www.shyeditor.com/pricing
Prices are subject to change. Please visit the official website for the most up-to-date pricing information.
Trial
Try it for free with 1 Active Device and 35,000 Credits (One-Time). BYOK and Third Party Providers.
Standard
One-time license with cloud credits and API key support for 1 device. Includes 35,000 Credits (One-Time), Unlimited App Updates, Third Party Providers, BYOK, and Local AI Providers.
Pro
One-time license with RewriteBar Cloud Subscription for 1 year for 3 devices. Includes 3 Million Credits (Monthly), Unlimited App Updates, Third Party Providers, BYOK, Local AI Providers, and 1 Year RewriteBar Cloud Subscription.
Extra Device
Add one Active Device to your license for Standard or Pro licenses.
RewriteBar Gateway
Use RewriteBar Gateway as your AI provider without your own API key. Access 41 AI models and 3 Million Credits (Monthly). Premium Models Included.
For the latest pricing, please visit this link: https://rewritebar.com/pricing
Prices are subject to change. Please visit the official website for the most up-to-date pricing information.
Textbuddy Premium
Unlimited GPT-4 access with features including grammar and spelling checks, readability score, text statistics, and one-click synonyms.
For the latest pricing, please visit this link: https://textbuddy.com/premium/
Prices are subject to change. Please visit the official website for the most up-to-date pricing information.
Scienhub is an AI-driven LaTeX editor designed for seamless scientific collaboration.
Free
Powerful Editor, 3 Collaborators, 2GB Storage, 25 Projects, 10 Rephrase, Zotero Integration, No Git Integration, No GitHub.
Plus
Powerful Editor, 8 Collaborators, 8GB Storage, 50 Projects, 120 Rephrase, Zotero Integration, Git Integration, No GitHub.
Pro
Powerful Editor, 15 Collaborators, 16GB Storage, 100 Projects, 360 Rephrase, Zotero Integration, Git Integration, GitHub Coming soon.
Premium
Powerful Editor, 50 Collaborators, 64GB Storage, 500 Projects, 1000 Rephrase, Zotero Integration, Git Integration, GitHub Coming soon.
For the latest pricing, please visit this link: https://scienhub.com/
Prices are subject to change. Please visit the official website for the most up-to-date pricing information.
Free
Regular AI Models: ChatGPT, GPT 5 mini, Gemini 3 Flash. 15 AI responses / Month. Great for general tasks. Quality responses. Browser extension, Web app, Voice input, File attachments, Priority support.
Pro
Regular AI Models: ChatGPT, GPT 5 mini, Gemini 3 Flash. Advanced AI Models: ChatGPT, GPT 5.1, Gemini 3.1 Pro, Sonnet 4.6. Generous usage. Great for complex tasks. Better quality responses. Browser extension, Web app, Voice input, File attachments, Priority support.
Elite
Regular AI Models: ChatGPT, GPT 5 mini, Gemini 3 Flash. Advanced AI Models: ChatGPT, GPT 5.1, Gemini 3.1 Pro, Sonnet 4.6. Thinking AI Models: Gemini 3.1 Pro Thinking, ChatGPT, GPT 5.1 Thinking, Sonnet 4.6 Thinking. High-volume usage. Great for reasoning tasks. Best quality responses. Browser extension, Web app, Voice input, File attachments, Priority support.
For the latest pricing, please visit this link: https://jetwriter.ai/pricing
Prices are subject to change. Please visit the official website for the most up-to-date pricing information.
Plus
For everyday creators. 400 credits per month, HD output with no watermark, standard processing speed, history saved for 7 days, gallery privacy toggle, commercial usage allowed, ads removed across the app.
Pro
For high-frequency designers. 1000 credits per month, HD output with no watermark, fast-lane processing queue, history saved for 30 days, gallery privacy toggle, commercial usage + API priority, priority customer support.
Max
For studios and teams. 3000 credits per month, 4K ultra resolution output, fastest queue with dedicated capacity, history saved for 365 days, gallery privacy toggle, enterprise commercial license, top-tier API concurrency, dedicated success channel.
Starter Pack
Perfect for trying out. 500 credits, one-time purchase, never expire.
Basic Pack
For regular use. 2500 credits, one-time purchase, never expire.
Pro Pack
Best value for power users. 6000 credits, one-time purchase, never expire.
For the latest pricing, please visit this link: https://nanoeditor.app/pricing
Prices are subject to change. Please visit the official website for the most up-to-date pricing information.
UnitText is an AI-driven copy editor that enhances your writing while preserving your unique voice.
Starter
Perfect for individuals getting started with content writing. Includes 10 AI-powered reviews per month and a maximum of 8,000 characters per review.
Pro
Ideal for professionals with extensive content review needs. Includes 50 AI-powered reviews per month and a maximum of 10,000 characters per review.
For the latest pricing, please visit this link: https://www.unittext.com/
Prices are subject to change. Please visit the official website for the most up-to-date pricing information.
What is Lemmi?
Lemmi is an advanced AI Resume Checker designed to enhance your job application process by providing instant scores and comprehensive reviews of your resume. With its cutting-edge technology, Lemmi evaluates your resume against industry standards and Applicant Tracking System (ATS) criteria, ensuring that your document is optimized for maximum impact. The tool not only highlights areas for improvement but also offers actionable suggestions to help you stand out in a competitive job market.
What is AI AI Grammar Checker
AI grammar checkers are advanced software tools that utilize artificial intelligence to enhance writing by identifying and correcting grammatical errors, punctuation mistakes, and style issues. They are designed to assist users in creating clear and coherent text across various contexts, including professional, academic, and casual writing. These tools often incorporate features like context-aware recommendations, vocabulary enhancement, and the ability to learn from user feedback. By leveraging natural language processing (NLP) and machine learning algorithms, AI grammar checkers can provide precise guidance tailored to the user's writing style and intent.
AI Grammar Checker core features
Core features of AI grammar checkers typically include: - Real-time grammar and punctuation correction - Contextual spell checking - Style suggestions for improved clarity - Vocabulary enhancement recommendations - Integration with various writing platforms and browsers - Plagiarism detection in some advanced versions - User learning capabilities to adapt suggestions based on previous corrections
Who is suitable to use AI Grammar Checker
AI grammar checkers are suitable for a wide range of individuals, including students, professionals, writers, and anyone looking to improve their writing skills. They can benefit non-native English speakers who may struggle with grammar rules, as well as native speakers who want a second pair of eyes on their writing. However, while these tools can greatly assist in catching basic and complex errors, they may not fully replace human proofreading, especially for nuanced content requiring stylistic finesse. Users should also remain aware of possible limitations in specialized or highly technical writing.
How does AI Grammar Checker work?
AI grammar checkers work by analyzing the text inputted by the user using advanced algorithms based on natural language processing. When a user types or pastes their text into the tool, the AI discerns the grammatical structure, checks for errors, and suggests corrections. This process involves identifying parts of speech, understanding context, and using large databases to draw upon grammar rules and writing conventions. The suggestions provided can range from simple corrections to more complex recommendations aimed at enhancing overall writing clarity and effectiveness, and they may adapt over time as they learn from user interactions.
Advantages of AI Grammar Checker
The advantages of using an AI grammar checker include increased accuracy in writing, enhanced clarity and readability of text, and a significant reduction in the time spent editing. These tools can help users catch errors they may overlook, thereby improving the overall quality of their work. Additionally, AI grammar checkers often provide detailed explanations for their suggestions, which can serve as a learning tool for users to understand and apply grammar rules. However, it's important to note that while these tools can be incredibly helpful, they are not infallible and may sometimes suggest changes that alter the intended meaning or tone of the writing.
FAQ about AI Grammar Checker
Grammarly is often considered a premium service due to its extensive features and user-friendly interface. Whether it is worth the price depends on individual needs, such as frequency of use, the importance of advanced grammar checks, and personal writing goals. Users who regularly produce professional or academic documents may find it worthwhile, as the tool can significantly enhance writing quality.
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