Best AI Writing Chrome Extensions
AI writing tools have evolved from simple spell checkers to sophisticated assistants that can rephrase sentences, adjust tone, generate content, and even help you think through ideas. Whether you write emails, blog posts, social media content, or academic papers, there is an AI writing Chrome extension that fits your workflow. Here is our detailed comparison for 2025.
Grammar and Correctness First
Grammarly
Grammarly remains the most popular writing assistant for Chrome, and for good reason. It checks grammar, spelling, punctuation, and style in real time across virtually every text field in your browser—Gmail, Google Docs, LinkedIn, Slack, and thousands of other sites.
The free tier handles core grammar and spelling. Grammarly Premium adds clarity suggestions, tone detection, full-sentence rewrites, a plagiarism checker, and vocabulary enhancement. Grammarly Business adds style guides and brand tone settings for teams.
Best for: Professionals, students, and anyone who writes frequently in English.
Price: Free tier available; Premium starts at around $12/month.
LanguageTool
LanguageTool is the best multilingual grammar checker available. It supports over 25 languages with high-quality rule-based and AI-powered corrections. The extension works across all text fields and provides clear explanations for each suggestion, helping you learn from your mistakes.
Best for: Non-native English speakers, multilingual writers, privacy-conscious users (self-hosted option available).
Price: Free tier available; Premium starts at around $5/month.
Grammarly vs LanguageTool
| Feature | Grammarly | LanguageTool |
|---|---|---|
| Languages | English only | 25+ languages |
| Free tier quality | Good | Good |
| AI rewriting | Yes (Premium) | Yes (Premium) |
| Tone detection | Yes | Limited |
| Plagiarism check | Yes (Premium) | No |
| Self-hosted option | No | Yes |
| Price (Premium) | ~$12/mo | ~$5/mo |
Browse all grammar tools in our writing extensions category.
AI Rewriting and Paraphrasing
Wordtune
Wordtune by AI21 Labs focuses specifically on rewriting. Highlight any sentence and Wordtune offers multiple alternative phrasings—casual, formal, shorter, longer, or just different. It is exceptional for those moments when you know what you want to say but cannot find the right words.
Best for: Anyone who struggles with phrasing or wants to vary their writing style.
Price: Free tier (10 rewrites per day); Premium starts at around $10/month.
QuillBot
QuillBot offers paraphrasing, grammar checking, summarizing, and citation generation in one extension. Its paraphraser has seven writing modes (standard, fluency, formal, simple, creative, expand, shorten) and does a good job maintaining the original meaning while changing the structure.
Best for: Students and content writers who frequently need to rephrase content.
Price: Free tier available; Premium starts at around $10/month.
Full AI Writing Assistants
Jasper
Jasper (formerly Jarvis) is a full-featured AI content generator that works through a Chrome extension. It can write blog posts, marketing copy, social media captions, product descriptions, and more. You provide a brief and Jasper generates drafts you can refine.
Best for: Marketing teams, content creators, and agencies producing high volumes of content.
Price: Paid only, starting at around $39/month.
ChatGPT Sidebar Extensions
Several extensions bring ChatGPT and other large language models into a sidebar panel while you browse. These let you ask questions, summarize pages, draft replies, and generate content without switching to a separate tab. Popular options include Sider and Merlin.
Best for: General-purpose AI assistance while browsing.
Price: Free tiers with daily limits; paid plans vary.
Specialized Writing Tools
Hemingway Editor (Web)
While not a Chrome extension, the Hemingway Editor web app deserves mention as a complement to grammar checkers. It highlights complex sentences, passive voice, and hard-to-read passages using a color-coded system. Paste your text in after drafting to tighten your prose.
Readable
Readable analyzes the readability of any webpage or text you enter, scoring it on Flesch-Kincaid, Gunning Fog, and other readability indexes. Useful for ensuring your content is accessible to your target audience.
How to Choose the Right AI Writing Tool
Your choice depends on your primary use case:
| Use Case | Best Tool | Why |
|---|---|---|
| Daily emails and messages | Grammarly | Works everywhere, catches errors in real time |
| Multilingual writing | LanguageTool | Best multi-language support |
| Rephrasing and rewording | Wordtune | Multiple phrasing alternatives instantly |
| Academic paraphrasing | QuillBot | Seven writing modes, built-in citations |
| Marketing content generation | Jasper | High-volume, template-driven content |
| General AI assistance | ChatGPT Sidebar | Flexible, conversational, multi-purpose |
A Word of Caution
AI writing tools are assistants, not replacements. Always review AI-generated content for accuracy, tone, and originality. Relying too heavily on AI rewriting can strip your unique voice from your writing. Use these tools to polish and speed up your workflow, not to outsource your thinking.
Explore more writing tools in our writing extensions category, or use our comparison tool to evaluate specific extensions head to head.