Smart Content Shield Pro

Blurs specific words and paragraphs semantically using Chrome's on-device Gemini Nano.

Smart Content Shield Pro keeps unwanted content off your screen: words, paragraphs, and images. It combines a fast local keyword filter with Chrome's built-in Gemini Nano AI, and everything runs on your own device. There are no accounts and no servers, and none of the pages you visit are ever sent anywhere. TWO LAYERS OF PROTECTION Instant keyword filter: Add exact words you want blocked and they are hidden the moment a page loads, with no waiting and no AI needed. One-tap suggestion chips let you block common profanity, adult content, and violent terms without typing anything. On-device AI filter: Turn on semantic filtering and Gemini Nano reads each paragraph locally, blurring content that matches a concept even when your exact words do not appear. It can catch toxicity, graphic violence, spoilers, or a custom rule you describe in plain English. WHAT YOU CAN BLOCK Toxicity: abusive, hateful, or harassing language. Violence: graphic descriptions of gore, self-harm, or horror. Spoilers: for a show, movie, game, or match you name. Custom rules: describe anything in plain English and it gets blocked. Literal keywords: your own exact-word blacklist. Images: flagged by their alt text, title, and surrounding context. BUILT FOR REAL BROWSING Choose how blocked content looks: blur, redact with a blackout bar, or frosted glass. Choose what happens to it: blur it, collapse it out of the way, or let the AI rewrite it into a safe summary. Set the sensitivity to strict, balanced, or permissive. Theme it your way with accent color, overlay tint, blur strength, and opacity. Works on dynamic pages, infinite scroll, and single-page apps. Whitelist sites you trust so the shield leaves them alone. PARENTAL LOCK Set a 6-digit PIN so settings, the master switch, and the whitelist cannot be changed without it. You can also lock the reveal, view-original, and copy actions. PINs are hashed with SHA-256 on your device, and the plain PIN is never stored. This is a deterrent rather than tamper-proof security, since it can be cleared by uninstalling the extension. PRIVATE BY DESIGN Everything happens on your device. The AI runs locally through Chrome's built-in Gemini Nano, so the pages you visit are never sent anywhere. There is no analytics, no tracking, no external server, and no sign-in. Your words and rules stay in local browser storage. REQUIREMENTS The AI filter needs a version of Chrome with the built-in Gemini Nano (Prompt API) available. The extension will offer to download the local model, which is a one-time, free download of roughly 2.2 GB. The instant keyword filter works on any modern Chrome with nothing to download. Take back control of what shows up on your screen: quietly, instantly, and entirely on your own device.