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Browser Extension · v2.0 Now Live

Write Smarter
with NAVW

Real-time grammar, spelling & punctuation checking — powered by AI, works on every website you visit.

Install Free — Chrome Web Store
Instant Checking
All Websites
4 AI Providers
Free — No Key Needed
Grammar & Spelling
Draggable Panel
Everything you need
to write better

One extension, zero setup, works everywhere from Gmail to Notion to Twitter.

AI

Instant, Zero Delay

Checks as you type with no perceptible delay. No waiting, no clicking — seamless real-time feedback.

WEB

Works Everywhere

Any text input on any website. Gmail, Notion, Twitter, LinkedIn, Google Docs — all covered.

G+S

Grammar, Spelling & Punctuation

Catches errors, misspellings, wrong homophones, missing commas — with clear explanations.

UI

Draggable Tooltip

A clean floating panel shows all issues. Drag it anywhere on screen. Apply fixes with one click.

FREE

Free by Default

LanguageTool integration is 100% free, no API key needed. Upgrade to any AI provider anytime.

SEC

Private & Secure

NAVW never stores your text. API keys stay in your browser only. No tracking ever.

4 AI Providers, Your Choice

Switch between providers anytime in Settings. Start free, upgrade when ready.

LanguageTool
No API key needed. Works instantly for free on install.
FREE — Default
Google Gemini
Free tier via Google AI Studio. Context-aware checking.
Free Tier
Claude (Anthropic)
Advanced AI grammar checking. Requires Anthropic API key.
AI — Paid
OpenAI GPT-4o
Powerful language understanding. Requires OpenAI API key.
AI — Paid

Start Writing Better — Right Now

Free, instant, no account required. Install NAVW and get real-time grammar checking everywhere.

Install NAVW Free — Chrome Web Store
Legal Document

Privacy Policy

How NAVW handles your data — clearly and honestly. Effective June 2025 · v2.0

NAVW is a browser extension that checks grammar, spelling, and punctuation in real time. This Privacy Policy explains what data is used, how it is processed, and your rights as a user.

Summary: NAVW does not collect, store, or sell your personal data. Text you type is only sent to the grammar API you choose, and only while you are actively using the extension.
01

Data We Collect

NAVW collects no personal information. The only data processed is the text you type into input fields on websites:

  • TXT
    Text input — Temporarily sent to the selected grammar provider's API. Not stored by NAVW.
  • CFG
    Settings — Preferences (provider, API keys, delay, language) saved locally in your browser only via chrome.storage.sync.
  • OFF
    No tracking — NAVW does not use analytics, cookies, fingerprinting, or any form of user tracking.
02

Third-Party Grammar APIs

When you type, NAVW sends that text to the grammar provider you selected in Settings:

LanguageTool
api.languagetool.org
Google Gemini
googleapis.com
Claude
api.anthropic.com
OpenAI
api.openai.com
Note: When using an AI provider, your text is sent to that provider's servers. Please review their privacy policies before entering sensitive information.

Your API keys are stored only in your browser's local storage and are never transmitted elsewhere.

03

Browser Permissions

  • TAB
    activeTab — To access and attach to text fields on the page you are currently viewing.
  • DB
    storage — To save your settings locally in your browser.
  • CTX
    contextMenus — To add a "Check Grammar with NAVW" right-click option.
  • API
    Host permissions — To make API requests to the grammar services listed above only.
04

Data Sharing

NAVW does not share, sell, rent, or trade any user data with any third party. The only data transmission is text sent directly to the grammar API you have chosen.

05

Data Retention

NAVW does not retain any data. Text checked is sent to the API in real time and is not logged, cached, or stored by the extension. Settings remain in browser local storage until you uninstall.

06

Children's Privacy

NAVW is not directed at children under 13. We do not knowingly collect any information from children. If you have concerns, please .

07

Changes to This Policy

We may update this Privacy Policy from time to time. The effective date at the top will be updated. Continued use of NAVW after changes constitutes acceptance of the updated policy.

Legal Document

Terms of Use

By installing and using NAVW, you agree to the following terms. Effective June 2025 · v2.0

By installing or using the NAVW browser extension, you agree to be bound by these Terms of Use. If you do not agree, please uninstall the extension.
01

Acceptance of Terms

These Terms govern your use of the NAVW Grammar Checker browser extension, created and maintained by Himaghna Medhi. By using the Extension, you agree to these Terms in full.

02

License to Use

We grant you a limited, non-exclusive, non-transferable license to use the Extension for personal, non-commercial purposes. You may not:

  • NO
    Copy, modify, or distribute the Extension's source code without written permission.
  • NO
    Reverse engineer, decompile, or disassemble the Extension.
  • NO
    Use the Extension for any unlawful, harmful, or fraudulent purpose.
  • NO
    Attempt to interfere with or disrupt the Extension's functionality.
03

Third-Party Services

NAVW integrates with third-party grammar and AI APIs. Your use of these services is governed by their respective terms and privacy policies. We are not responsible for the availability or accuracy of these third-party services.

You are solely responsible for obtaining and managing any API keys required for paid providers.

04

Disclaimer of Warranties

The Extension is provided "as is" and "as available" without any warranties, including accuracy of grammar suggestions or uninterrupted availability. Grammar suggestions are generated automatically and may not always be correct — always review before applying.

05

Limitation of Liability

To the fullest extent permitted by law, Himaghna Medhi shall not be liable for any indirect, incidental, or consequential damages arising from your use of the Extension, including data loss or errors in grammar suggestions.

06

Modifications

We reserve the right to modify or discontinue the Extension at any time without notice. We may also update these Terms at any time. Continued use after updates constitutes acceptance of the revised Terms.

07

Contact

If you have questions about these Terms, please or reach out on X @himaghnamedhi.

Get in Touch

Say Hello

Have a question, bug report, or feature request? Reach out — we read everything.

Send a Message

Message received. We will get back to you on X @himaghnamedhi.