AI that lives
inside your browser.
NanoChat is the private, local AI assistant powered by Google's built-in Gemini Nano. No API keys, no latency, no tracking.
It reads the page
along with you.
NanoChat sees what's in front of you. Ask questions about an article, a doc page, or a thread — summaries and translations without ever copying a word out.
The smart
context menu.
Select any text. Five instant actions appear in a tiny floating toolbar. Everything runs on-device, instantly.
Summarize
Compress selection to a few bullets.
Rewrite
Reword for tone, register, or length.
Spellcheck
Catch typos without leaving the page.
Explain
Get the meaning, in plain language.
DEAa?
Eleven days without a single landing. In 2007, Bar-tailed Godwit E7 crossed 13,000 kilometres of open Pacific in one non-stop flight.
Anything you didn't get,
explained in place.
Highlight the part that tripped you up. Get a plain-language explanation right inline. Gnarly legalese, dense academic prose, or paragraphs in languages you don't read.
Comme la plupart des Grues, elle émet des chants caractéristiques grâce à la trachée enroulée dans son sternum, qui agit as une caisse de résonance. Ce son grave et puissant peut porter à plus de cinq kilomètres.
Explain“trachée” — what it meansIn French, the windpipe. The tube that carries air to the lungs.Why the coil mattersCranes' tracheas loop several times inside the sternum. The coil acts as a resonance chamber, deepening their calls.Continue in ChatQuietly, in the
background.
Four more things NanoChat handles without asking — no setup, no cloud, no second thought.
Image input
Attach screenshots. Gemini Nano reads it locally.
Local history
Saved on disk and searchable. Nothing syncs.
Agent mode
It can navigate and type on your behalf.
Zero config
No keys, no accounts. Just install and chat.
Local AIisn'tfree.
Gemini Nano does the thinking on your machine — no server, no API. The price isn't money. It's paid in disk, memory, and silicon.
Everything else.
The questions worth asking before you install — answered straight.
No. NanoChat runs entirely on Chrome's built-in Gemini Nano. Your prompts, the pages you ask about, and your chat history are processed and stored locally — nothing is sent to a server.
Gemini Nano is Google's on-device AI model, built into Chrome and exposed through the Prompt API. NanoChat uses it so the model runs on your own hardware instead of in the cloud.
Yes, once the model is downloaded. You need to be online a single time for the initial Gemini Nano download; after that, everything works without a connection.
Chrome 138 or later on Windows, macOS 13+, Linux, or ChromeOS, with a GPU over 4 GB of VRAM — or a CPU path with 16 GB of RAM and 4 cores. The model needs about 22 GB of free storage.
Yes. NanoChat is free and open-source under the MIT license. There are no accounts, no API keys, and no subscriptions.
Chrome 138 and later, on Windows, macOS, Linux, and ChromeOS. NanoChat depends on Chrome's built-in Prompt API, so other browsers aren't supported yet.
ChatGPT and most browser AI extensions send your prompts and page content to a remote server and need an account or API key. NanoChat runs the model locally on Chrome's built-in Gemini Nano, so it works offline, has no per-request latency or usage limits, and nothing you type leaves your machine. The trade-off is that an on-device model is smaller than a large cloud model, so it suits quick summaries, translations, and page-aware questions rather than the heaviest reasoning tasks.
One click.
Nothing else.
No account, no API key, no configuration. Install the extension and start talking to a model that never leaves your machine.