AI tools for: free grammar checker online

Grammarly Verified Grammar Checker

AI writing assistant that checks grammar, spelling, tone, and clarity across emails, documents, and messages.

ProWritingAid Verified Grammar Checker

AI-powered writing assistant that checks grammar, style, and structure across apps like Word, Google Docs, and Scrivener.

Quillbot Verified Writing Assistants

AI-powered writing assistant that paraphrases, checks grammar, summarizes, translates, and detects AI content.

Linguix Verified Grammar Checker

AI writing assistant and grammar checker — works in your browser to fix mistakes and improve clarity across emails, docs, and websites.

LanguageTool Verified Grammar Checker

AI-powered grammar and spell checker that proofreads your writing in over 30 languages, with style suggestions and paraphrasing.

ZeroGPT Verified Content Detector

AI text detector that analyzes writing to identify content from ChatGPT, GPT-5, Gemini, and other LLMs

Grammar Checker Verified Grammar Checker

Free AI grammar, spelling, and punctuation checker — paste text and get instant corrections

Copyleaks Verified Plagiarism Checker

AI-powered plagiarism detection and AI content identification — scan text, documents, and code for originality and authenticity.

Plagramme Verified Plagiarism Checker

AI and plagiarism detection tool — check documents for originality and AI-generated content across 100+ languages.

Paraphraser.io Verified Text Classifier

Free online tool that scans your text against online sources to detect plagiarism and provide a detailed originality report.

Trinka AI Verified Grammar Checker

AI-powered grammar checker and writing assistant designed for academic and technical writing.

WhiteSmoke Verified Grammar Checker

Grammar checker and writing enhancement tool — corrects spelling, punctuation, style errors and provides writing tutorials

Plagiarismsearch.com Verified Plagiarism Checker

Professional plagiarism checker — scan documents against billions of web pages and academic sources for originality verification.

Scribbr Verified Study Tool

Academic writing toolkit — proofreading, plagiarism checking, citation generation, and AI detection for students

Plagiarismdetector.net Verified Writing & Content

Free online plagiarism checker — paste text or upload a file to detect copied content with a percentage score

Quetext Verified Writing Assistants

AI-powered plagiarism checker and writing assistant — detect copied content, AI-generated text, and improve grammar in one tool

Corrector App Verified Grammar Checker

Free online grammar and spell checker for English, Tagalog, and 25+ other languages.

Plagium Verified Study Tool

Free online plagiarism checker — compare text against web pages to detect copied content.

textadviser.com Verified Writing Assistants

Free online toolkit for grammar checking, plagiarism detection, text generation, and translation — all in one place.

outwrite.com Verified Writing Assistants

AI writing assistant that checks grammar, improves style, and rewrites sentences across Google Docs, Word, and email.

AHelp Verified Writing Assistants

AI-powered writing assistant for students — check grammar, paraphrase text, detect AI content, and generate essays.

Merriam-Webster Verified Study Tool

Comprehensive dictionary and thesaurus with word definitions, etymology, games, and a daily chatbot assistant.

Inspera Content Detector

AI content detector — paste text to instantly check if it was written by AI or a human.

editGPT Verified Grammar Checker

Chrome extension that adds Grammarly-like proofreading and editing directly to ChatGPT's interface

Ahrefs Plagiarism Checker Verified Study Tool

Free plagiarism checker that scans your content against billions of web pages to detect copied text

Plagiarism Remover Verified Rewriter

AI-powered tool that rewrites text to eliminate plagiarism while preserving meaning — paste or upload your content.

Acrolinx Verified Grammar Checker

AI-powered content governance platform that ensures your writing meets brand, legal, and regulatory standards

WebSpellChecker Verified Grammar Checker

Multilingual spelling and grammar checker that integrates directly into websites and web applications.

Rephrasely Verified Rewriter

AI-powered paraphrasing tool that rewrites text in 18 different writing modes and checks for plagiarism.

Quill.org Verified education

Free writing and grammar tool for K-12 students — AI-powered feedback on sentence construction, proofreading, and reading comprehension