Online Proofreader
The best 50 Online Proofreader AI tools - Free & Paid
Explore 50 AI for Online Proofreader
WProofreader offers AI‑driven, multilingual spelling, grammar, and style checking for 20+ languages. It provides SDKs, an API, browser extensions, and CMS modules, with TLS encryption, GDPR compliance, on‑prem or AWS hosting, and customizable industry rules.
Freemium
This AI tool is a free online writing assistant with advanced features to enhance writing skills and prevent plagiarism.
Freemium
Scribbr offers academic writing support with professional editing, plagiarism detection, citation generation across styles, AI‑powered proofreading, paraphrasing, summarizing, sentence rewriting, and a Chrome extension for in‑browser citations, helping students and researchers produce polished manus
Freemium
Web‑based grammar checker supporting 27 languages—including Tagalog and English variants—highlights spelling, grammar, punctuation errors and offers corrections. It accepts rich text up to 15,000 characters, detects GPT‑style typos, and includes an AI content detector, usable from any browser.
Free
LanguageTool is an AI grammar, spelling, and style checker supporting 30+ languages. It offers real‑time browser extensions, desktop and Word add‑ins, advanced Picky Mode, paraphrasing, and an API for developer integration.
Free
Outwrite is an AI assistant that instantly corrects spelling, grammar, and punctuation across Chrome, Edge, Google Docs, and Word. It provides real‑time readability scores, offers style and paraphrasing suggestions, and converts passive to active voice in English, French, and Spanish.
Free
- $6.95/mo
ProWritingAid is an AI writing assistance tool that offers suggestions for grammar, style, and improvement with the touch of a button.
Freemium
Paraphrase Online is a free tool for rephrasing text, supporting multiple formats and languages. It features five paraphrasing modes to customize output while ensuring grammatical accuracy and preserving original meaning, ideal for avoiding plagiarism.
Freemium
Rewrites text in seven styles—Simple, Creative, Formal, etc.—across 17 languages, preserving meaning while enhancing grammar, punctuation, and readability. Removes duplicate phrases for plagiarism‑free output and works with plagiarism/readability tools for students, writers, and SEOs.
Paid
- $3
BookEdit is an innovative book editing solution that speeds up the modification process with advanced proofreading, paraphrasing, translation, and expansion features.
Paid
QuillBot is a writing and editing tool offering features such as paraphrasing, grammar and plagiarism checks, citation generation, and content creation assistance, all accessible through a Chrome extension or online platform.
Freemium
- $33/mo
CorrectEnglish is an AI writing assistant delivering spelling, grammar, and style corrections on Android, iOS, and browsers. It offers contextual word suggestions, error detection, a plagiarism checker, formatting guides, readability scores, and integrates with extensions and research tools.
Freemium
- $24/mo
Online Document Translator provides professional translations while preserving original formatting across various document types. It supports over 80 languages, offers batch processing, custom terminology, online editing, and ensures data privacy, making it ideal for individuals and teams.
Freemium
- $5
Hemingway Editor analyzes text for readability, highlighting long or dense sentences, adverbs, and passive voice, suggests simpler wording, and—via Editor Plus—adds AI-assisted fixes, advanced grammar checks and tone controls for faster revision.
Free trial
L21 AI Proofreader enhances written content accuracy and contextuality of live events.
Freemium
editGPT is a Chrome extension that turns ChatGPT into a writing assistant. It provides real‑time grammar, style, and rewriting support in 80+ languages, preserves formatting, tracks changes, and manages revisions.
Free
- $10/mo
Wordvice AI provides real‑time grammar checking, paraphrasing, translation, summarization, plagiarism and AI‑content detection, plus citation generation across multiple languages. It integrates with Chrome and Word, supporting students, researchers, professionals, teams, and offers on‑demand human e
Freemium
- $8.45/mo
Smart Online Notepad is a flexible writing tool that offers AI grammar correction, tone adjustment, real-time word counting, and easy note sharing. It supports multiple languages and has a user-friendly design with dark and light modes.
Free trial
AI-based plagiarism remover rewrites duplicate text while preserving context and readability, offering modes (Word Changer, Formal, Shorten), file upload/download, 15+ languages and integrated tools for checking, paraphrasing, grammar, summarizing and citation generation and export.
Free
InstaText is an AI editing assistant that highlights suggestions for clarity, flow, word choice, and grammar. Users can accept or reject each change, select dialect, formality, or add custom terms. It works on Chrome, Gmail, Slack, Docs, Overleaf, and Word.
Paid
- $9.99/mo
Check Typo is an AI‑powered spell‑checker extension that integrates into web forms, Gmail, LinkedIn, and social media drafts, supporting 100+ languages and preserving tone while providing real‑time corrections for students, professionals, and writers.
Free
Resoomer summarizes web articles, PDFs, DOCX, EPUB, and plain text, extracting key points and arguments. It offers instant, editable summaries, a text editor, paraphraser, synonymizer, and word counter in multiple languages for students, researchers, writers, and professionals.
Freemium
ParagraphAI offers real‑time grammar correction, one‑tap email drafting, and instant summarization of web pages and PDFs. It provides multilingual translation, customizable tone filters, a template library, and an instruction engine for repetitive tasks across mobile, desktop, and Chrome.
Free
MyPerfectWords connects students and researchers with qualified writers holding advanced degrees across 140+ disciplines. A three‑step review ensures proper structure, citations, and formatting. Each submission includes Turnitin and AI originality checks. 3‑hour urgent turnaround and 24/7 chat suppo
Paid
TextAdviser delivers AI‑powered language tools: grammar checking, plagiarism detection, syntactic analysis, fast text generation, rewriting, tone humanization, summarization, and name/title creation. It supports English, Spanish, Portuguese, Italian, French, and German for writers, students, markete
Free
Word Spinner is an AI‑powered writing assistant that improves tone, flow, and readability for blog posts, emails, ads, and web copy. It offers grammar checks, tone analysis, and a Chrome extension supporting 100+ languages.
Subscription
- $29/mo
Quetext is an all‑in‑one writing platform offering plagiarism detection, AI content detection, real‑time grammar and spell correction, summarization, paraphrasing, and citation generation. It supports PDF, DOC, TXT files with bulk uploads for students, teachers, researchers, and creators.
Freemium
- $8/mo
Reescribir Textos es una herramienta AI que reestructura oraciones, párrafos y artículos manteniendo su significado, con modos sencillo, medio, formal e inteligente. Permite pegar, subir archivos y descargar resultados en DOC, facilitando la generación de contenido único y legible.
Free
This AI paraphrasing tool lets users paste essays, articles, or sentences and receive a rewritten version within seconds. It preserves meaning, corrects grammar, removes duplicate phrasing, and ensures academic compliance without account creation.
Free
PaperTyper generates academic drafts from prompts, offering built‑in plagiarism checking, grammar correction, and citation formats (MLA, APA, Chicago, Harvard, Turabian). Users can edit, format, and export content as Word or PDF at any time.
Free
Online Word Editor is a versatile AI writing assistant that allows users to generate, rewrite, translate, and summarize text, facilitating faster content creation and refinement for students, professionals, and content creators across various writing skill levels.
Free
NoPlagio checks uploaded documents against 80 million academic articles and live web sources, supporting 129 languages. It gives similarity scores, color‑coded plagiarism types (citation, paraphrase, improper reference), source links, and protects privacy by never storing files.
Freemium
Rewording Tool uses AI to rewrite text for clarity and natural flow while preserving meaning. Select from ten styles—formal, casual, academic, etc.—in over 25 languages. Paste or upload, and instantly receive polished sentences for essays, reports, marketing, or business communication.
Free
Reword Generator rewrites text using context‑appropriate synonyms while correcting grammar and punctuation. Paste or upload files (.txt, .doc, .pdf) and select tones such as Formal, Informal, Academic, or SEO. Supports up to 200 words per edit for academic or marketing content.
Paid
TextGears is a grammar and spell checker with an API for automated proofreading, readability scoring, and text analysis. It supports multiple languages and offers both cloud-based and self-hosted deployment for integration into various business workflows.
Subscription
PolitePost.net is a Microsoft Word add‑in that rewrites draft emails to improve tone, remove jargon, and fix grammar while preserving intent. It delivers polished versions in seconds, supports multiple style guidelines, and maintains data privacy.
Freemium
FuturePerfect scans every public page of a website for spelling and grammar errors in 30 languages, delivering instant alerts and a dashboard of correction suggestions. No code integration required—just a URL to keep content error‑free and professional.
Freemium
Rewriter PRO AI converts machine‑generated text into natural, detector‑proof language with adjustable fluency (basic, intermediate, advanced). Users set tone—formal, creative, etc.—and target audiences across emails, proposals, blogs. It supports multiple languages and offers instant grammar correct
Free
RewriterPRO turns AI‑generated text into natural, human‑like language, offering tone, fluency, length, and language customization. It bypasses detectors such as Turnitin, supports bulk rewriting, and delivers SEO‑safe, consistent content on desktop or mobile.
Free
Textbuddy is an AI‑powered rewriter and plain‑English editor that flags long sentences, complex words, passive voice, and filler words, providing a readability score. It offers synonyms, CEFR language levels, keyword repetition stats, and supports over 50 languages.
Subscription
PerfectEssayWriter.ai creates structured, plagiarism‑free essays for high‑school to professional users. Set word count, essay type, academic level, tone, and citation style. Supports 27+ languages, real‑time research prompts, auto‑citation, live editing, and undetectable output.
Subscription
AI Content Checker is a free browser extension that enhances web publishing by detecting errors, ensuring quality logic, and perfecting content before publication. It offers features like reviewing pages, answering specific questions, highlighting headings/links, identifying spacing issues, and open
Free trial
An AI platform that rewrites text in eight styles—Standard, Fluency, Humanizer, Simplify, Creative, Academic, Shorten, Expand—while supporting custom modes, tone settings, synonym selection, audio‑to‑text, OCR, and a research panel. Available via browser extensions, mobile apps.
Free
Rewriter PRO AI transforms AI‑generated text into natural, detector‑proof content with adjustable fluency levels, tone options, and multilingual support. It includes grammar refinement, plagiarism checks, bulk upload, and output download for academic, marketing, and professional use.
Free
Linguix is a writing tool that offers free grammar check, analyzes team performance over-time, can be accessed through various platforms, and has a clean and modern UI.
Freemium
- $99
AI Humanizer refines text by restructuring sentences to improve flow and reduce mechanical patterns while preserving meaning. It offers adjustable rewrite modes, selective paragraph editing, keyword protection, and built‑in AI detection and plagiarism checks.
Free trial
- $8/mo
Originality.ai evaluates text for AI generation, plagiarism, factual accuracy, readability, grammar, and SEO. The Chrome extension and web app enable on‑page checks, bulk scanning, PDF uploads, and API integration for writers and editors.
Free trial
- $12.95/mo
AI Text Humanizer turns machine‑generated prose into natural, human‑readable text, removes repetitive patterns, offers readability scores, and supplies API and web interface with counters. It supports multiple languages, protects data, and assists students, writers, marketers, and corporate teams.
Freemium
The Free AI Rewriter Tool offers users a method to quickly rephrase content in multiple languages, ensuring originality and readability. It caters to diverse users, maintaining original meaning while adapting tone and managing word count efficiently.
Free
PunctuationCheck is an AI tool that instantly corrects punctuation, grammar, and spelling, offering manual or batch edits. It supports regional English variants, basic formatting, PDF export, and processes text locally for privacy.
Free