Grammarly: AI Writing and Grammar Checker App by Grammarly

Grammarly for Firefox is your always-on assistant for clearer, more compelling communication. It helps you brainstorm ideas, overcome writer’s block, and refine your writing with confidence, precision, and ease.

Powered by advanced AI, Grammarly does more than correct mistakes. It generates one-click drafts to help you get started, builds organized outlines, sharpens tone for any audience, and adapts to your goals as you write—whether you're working on a school assignment, a business email, or anything in between.

With built-in plagiarism detection and AI content checks, Grammarly supports originality while helping you write faster, sound sharper, and communicate more effectively—anywhere you write online.

➤ How it works

Grammarly works right where you do—in your browser—offering real-time feedback as you type in emails, documents, and more.

It goes beyond surface-level edits by offering suggestions that help you organize your ideas, strengthen your arguments, and tailor your tone to your audience. Whether you’re tightening a sentence or reworking a full draft, Grammarly adapts to your goals, context, and intent in real time.

You can apply suggestions instantly or expand them to see the "why" behind each one—putting you in control and helping you build stronger writing habits with every edit.

➤ What’s included?

~ Free

Everything you need to write more clearly and confidently:
• Real-time grammar, spelling, and punctuation feedback
• Suggestions to improve clarity and tone
• Auto-citations in APA, MLA, or Chicago style
• Built-in AI to help you brainstorm, draft, and rewrite content

~ Pro

Advanced support for high-impact writing:
• Sentence rewrites to improve clarity, flow, and engagement
• Tone, formality, and word choice enhancements
• Feedback tailored to academic, technical, or professional contexts
• Audience insights to guide how your message is received
• AI content detection and plagiarism checks for originality
• Team features like style guides and tone profiles (for business users)

➤ Terms and Conditions

By installing the extension, you agree to and acknowledge:
www.grammarly.com/terms
www.grammarly.com/privacy-policy

➤ Works where you write

Grammarly integrates directly into your browser—no copying and pasting needed. Get writing support across:
• Google Docs
• Gmail
• LinkedIn
• And 500,000+ apps and websites

➤ Get Grammarly on your desktop

Want Grammarly in Word, Outlook, Slack, and more? Download Grammarly for Windows or Mac: www.grammarly.com/desktop

➤ Explore docs, Grammarly's new AI writing surface

Looking for a powerful space to write and refine your ideas? Docs is Grammarly’s dedicated writing surface built for deep focus and support at every step. Unlike the Firefox extension or desktop app, it’s your all-in-one hub for strategic insights, from audience reactions to grade predictions.

Go from blank page to polished piece—all in one intelligent space. Learn more about docs and how it can transform your writing: www.grammarly.com/docs

➤ Trusted by millions of users

“Grammarly ensures your messages are professional and grammatically correct by offering spell-checking, tone suggestions, and even vocabulary hints.” —Forbes

“It’s the go-to service for fixing grammar, punctuation, and awkward sentences for professionals, college students, and people who write for a living.” —Inc.

“Unlike basic spell checkers, Grammarly is a complete writing assistant app.” —PC Mag

➤ We value your trust

Your data privacy and security are at the core of everything we do. Learn more about our user-first approach to trust and safety: www.grammarly.com/trust

California residents, please see the California Privacy Notice: https://www.grammarly.com/privacy-policy#sectionSingleColumn_47y4NWiOf89wt12wcc6a74