The best grammar checkers tools to use in 2026

Last updatedSep 26, 2026

Products considered23

AI-powered grammar, spelling, style, and tone checkers for any type of writing.

Top reviewed Grammar Checkers

Quill.orgQuill.org provides free, AI-powered writing and grammar activities for elementary, middle, and high school students to build literacy skills.

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Research & Education·Academic Writing Tools·Grammar Checkers

PaperpalPaperpal is an AI-powered academic writing platform with grammar checking, paraphrasing, plagiarism detection, citation generation, and access to 250M+ research articles. Free to start.

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Research & Education·Academic Writing Tools·Grammar Checkers

ChatGPT Writer (Jetwriter AI)Write emails, fix grammar, translate, summarize, and chat with any page using AI. Free browser extension powered by GPT-5, Claude, and Gemini.

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AI Writing Assistants·Email Writing Tools·Grammar Checkers

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DefudgerDefudger uses AI to simplify confusing, jargon-heavy, or unclear text into plain, readable language. Perfect for professionals, students, and content creators.

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AI Writing Assistants·Paraphrasing Tools·Grammar Checkers

BriefCatchBriefCatch is the AI-powered legal writing editor trusted by 300+ law firms and 80+ courts. Runs natively in Microsoft Word with zero data retention and SOC 2 security.

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Document Tools·AI Writing Assistants·Grammar Checkers

GPTZero AI DetectGPTZero is the world's #1 AI content detector. Instantly check text for AI generation from ChatGPT, GPT-5, Gemini, and more with 99% accuracy. Free to use.

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Research & Education·Academic Writing Tools·Grammar Checkers

QuillBotQuillBot is a complete AI writing suite with paraphrasing, grammar checking, AI detection, plagiarism checking, summarization, and citation generation. Free to start.

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AI Writing Assistants·Paraphrasing Tools·Grammar Checkers

GrammarlyGO AI WritingGrammarlyGO is an AI writing assistant trusted by 40M+ users. Get grammar checks, tone suggestions, text generation, and more across any app or website.

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AI Writing Assistants·Paraphrasing Tools·Grammar Checkers

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ProWritingAidProWritingAid is the ultimate writing toolkit for fiction authors. Get grammar checking, style editing, manuscript analysis, and AI-powered feedback in one platform. Free to start.

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AI Writing Assistants·Paraphrasing Tools·Grammar Checkers

First Draft AIFirstdraft is a free AI writing assistant with 50+ templates for essays, SEO content, emails, social media, scripts, and more. Features inline editing, proofreading, paraphrasing, and summarization.

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AI Writing Assistants·Copywriting Tools·Grammar Checkers

Slick WriteSlick Write is a free online grammar checker and style analyzer for bloggers, students, novelists, and SEO professionals. Instantly catch errors and improve your writing quality.

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Writing·AI Writing Assistants·Grammar Checkers

ParaphraseTool AIParaphrase, reword, and rewrite text with 20 AI-powered modes in 100+ languages. Includes plagiarism checker, grammar checker, AI detector, and keyword-to-paragraph composer.

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AI Writing Assistants·Paraphrasing Tools·Grammar Checkers

Trinka AITrinka AI is a privacy-first AI writing assistant for academic and technical writing. Improve grammar, paraphrase, check citations, detect plagiarism, and more. Try for free.

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AI Writing Assistants·Academic Writing Tools·Grammar Checkers

Linguix AI GrammarLinguix is an AI-powered grammar checker and writing assistant for teams. Check grammar in 7 languages, rewrite text, score content quality, and enforce style guides — all in your browser.

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AI Writing Assistants·Paraphrasing Tools·Grammar Checkers

Outwrite AIOutwrite is an AI writing assistant that checks grammar, suggests style improvements, and rewrites sentences. Works in Google Docs, Gmail, LinkedIn, and more. Free to start.

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AI Writing Assistants·Paraphrasing Tools·Grammar Checkers

WordfixerBotWordfixerBot offers an AI-powered paraphrasing tool with 10 tone options, plus a grammar checker, text summarizer, and text compare — perfect for writers, students, and marketers.

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Summarizers·Paraphrasing Tools·Grammar Checkers

Writefull AIWritefull uses AI trained on millions of journal articles to help researchers and students write, paraphrase, copyedit, and polish academic papers.

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Academic Writing Tools·Paraphrasing Tools·Grammar Checkers

WordtuneWordtune is a free AI writing tool that helps you paraphrase, rewrite, fix grammar, and express your ideas with confidence. Trusted by 10M+ users worldwide.

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AI Writing Assistants·Paraphrasing Tools·Grammar Checkers

LanguageToolCheck grammar, spelling, punctuation, and style errors instantly with LanguageTool's AI-powered writing assistant. Supports 30+ languages with browser add-ons and office integrations.

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AI Writing Assistants·Paraphrasing Tools·Grammar Checkers

Ghotit DyslexiaGhotit Real Writer & Reader offers context-aware spell check, grammar correction, word prediction, and text-to-speech for people with dyslexia and dysgraph

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Academic Writing Tools·Grammar Checkers·Text to Speech Tools