Comment Vibe — Private AI Tone Checker

Your words matter. Comment Vibe gives you a quiet second look before you share them. As you write a comment, a small badge shows how it may land. If your draft sounds harsh, click it for a clear explanation and a kinder rewrite that keeps your point. Everything is powered by Chrome's built-in Gemini Nano model on your device — no account, no servers, and no data collection. HOW IT WORKS 1. Type a comment on LinkedIn, X (Twitter), YouTube, Reddit — or anywhere with a comment box. 2. See a small, steady badge beside your draft. It updates quietly as you write. 3. Tap the badge for context. When your draft needs care, choose a kinder rewrite or copy it for later. YOU'RE IN CONTROL • Hide the guidance on one site directly from the tone card • Turn Comment Vibe on or off globally, or set a site-specific preference • Changes apply right away and sync with your signed-in Chrome profile FOUR CLEAR TONE LABELS 😊 Positive — constructive and friendly 😐 Neutral — balanced and factual 😕 Negative — may come across as harsh or critical 🚫 Toxic — potentially aggressive or harmful language SPEAKS YOUR LANGUAGE Writing in Polish, Spanish, Japanese — or another language? Comment Vibe detects your language and returns the tone label, explanation, and rewrite in that same language. No translating needed. (Powered by Chrome's on-device Language Detector and Translator APIs.) WHY PEOPLE USE IT • Catch a heated tone before it creates friction • Make your point without making things personal • Build better communication habits over time • Write in your own language • Start without an account or a setup flow PRIVATE BY DESIGN All analysis happens locally using Chrome's on-device Gemini Nano model. Your comments never leave your device. There is no account, tracking, or analytics — and it continues working offline once the model is downloaded. REQUIREMENTS • Chrome 138 or later, on desktop (Windows, macOS or Linux) • Hardware eligible for Gemini Nano — Chrome downloads the on-device model (~2 GB) automatically the first time it's used • On older builds (Chrome 127–137) only: enable "Prompt API for Gemini Nano" at chrome://flags, then update "Optimization Guide On Device Model" at chrome://components. No flags needed on 138+. TIP: The very first analysis can take a moment while Chrome loads the model — after that it's instant.