We don't ask for your trust. We built a system where data surveillance is technically impossible.
From download to destruction, here is how your data flows (and doesn't flow).
Download the ~22GB Gemini Nano model. It lives permanently on your device, managed by Chrome.
Chat with AI entirely offline. Your prompts go from UI → RAM → GPU. No network calls.
Click "Burn" to cryptographically shred the session state. RAM is cleared, data vanishes.
The Chrome Prompt API is a groundbreaking web standard that gives your browser built-in AI capabilities. It allows websites to access a high-performance AI model that runs directly on your device.
Instead of sending your text to a supercomputer in a data center (like ChatGPT or Claude), Chrome downloads a compact, efficient AI model called Gemini Nano directly to your computer.
Once downloaded, this "brain" lives inside your Chrome browser. It thinks, writes, and answers questions using your own computer's power—completely offline and privately.
The core innovation is the Chrome Prompt API. It allows us to run Google's Gemini Nano model directly inside your browser.
Your prompts never leave your device. No API keys, no cloud processing.
Conversation history lives in volatile memory. Closing the tab wipes it instantly.
We have no database to breach. We couldn't see your chats even if we wanted to.
The application is a static site built with Next.js and deployed to Cloudflare Pages. This means there is no API server, no database, and no logging infrastructure. The code you see on GitHub is exactly what is served to your browser.
We strictly forbid any form of persistent storage. Conversation history exists only in React component state (RAM).
The "Burn" feature isn't just a UI animation—it's a cryptographic shredding of the conversation state. When triggered, we explicitly nullify all state references, allowing the JavaScript engine's garbage collector to reclaim the memory immediately.
Trust requires transparency. The entire codebase is open source under the MIT License. You can audit every line of code yourself.
View Source CodeIt is a revolutionary technology that lets your browser run powerful AI models (like Gemini Nano) directly on your computer. This means you get smart features without needing to send your private data to a cloud server.
Privacy: Your data never leaves your device.
Reliability: Works offline without server downtime.
Cost: Free service, no expensive GPU servers.
Speed: Instant responses, no network latency.
Yes. Because the AI runs on your hardware (client-side), we don't have to pay for massive server farms. You provide the compute power, so we don't have to charge you a subscription.
No. Since the AI runs entirely on your computer, your messages never travel over the internet. It is technically impossible for us, Google, or anyone else to intercept or read your conversation.
Nowhere permanent. Your chat history lives only in your computer's temporary RAM. As soon as you close the tab or refresh the page, it is instantly and permanently erased.
Traditional AI chatbots send your messages to central servers where they can be stored, analyzed, or leaked. ThisChatNeverExisted keeps everything on your own machine, eliminating the risk of server-side data breaches.