nay-cat

nay-cat / ChromeChat

Public

PWA chat with Gemini Nano running locally in Chrome using Prompt API, no server, no API key, works fully offline.

nay-cat.github.ioChromeChat chatbot chrome gemini llm llm-tools
14
4
89% credibility
Found May 21, 2026 at 14 stars -- GitGems finds repos before they trend. Get early access to the next one.
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AI Analysis
JavaScript
AI Summary

ChromeChat is a free, privacy-focused chat app that brings an AI assistant directly into your browser. Unlike cloud-based AI tools, everything runs locally on your own computer — your messages never leave your device. After a one-time setup (downloading the AI model), you can chat offline, attach documents and images, and export your conversations. The app saves your chat history locally and automatically manages storage by removing old chats when space runs low. It's designed for anyone who wants AI assistance without sacrificing privacy or depending on an internet connection.

How It Works

1
💬 You hear about a chat app that works anywhere

A friend tells you about ChromeChat — an AI assistant that runs completely offline, even on airplanes or in basements with no Wi-Fi.

2
🌐 You visit the webpage once with Wi-Fi

You open the website in Chrome. On this first visit, your browser checks if it's ready to run the AI assistant.

3
🧠 Your browser downloads its AI brain

If the AI isn't ready yet, Chrome downloads a small brain (~4 GB) that lives inside your browser forever. This happens only once.

4
🌍 You pick your preferred languages

You choose which languages you want the assistant to understand — English, Spanish, Japanese, or all three.

5
✨ You start chatting

You type a question and get an instant reply. The AI thinks right on your computer — no internet, no waiting for servers.

6
📎 You attach files, images, or PDFs

Drag and drop a document or screenshot, and the AI reads through it and answers your questions about it.

🔒 Your conversations stay private on your device

Everything — your messages, your files, your chat history — lives only on your computer. No servers, no tracking, no internet required.

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Star Growth

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AI-Generated Review

What is ChromeChat?

ChromeChat is a progressive web app that turns your browser into a private AI chatbot. It runs Gemini Nano directly on your machine using Chrome's built-in Prompt API, meaning your conversations never leave your device. After downloading the model once (roughly 4GB), you can chat offline with no server, no API key, and no monthly bills. The app supports file attachments, markdown rendering with syntax highlighting, and exports your chats as portable files.

Why is it gaining traction?

The privacy angle is the hook. Every AI chat tool forces you to trust a third party with your data, but ChromeChat keeps everything local. The offline capability is genuinely useful for developers working in restricted environments or travelers without reliable connectivity. The fact that it leverages Chrome's built-in AI infrastructure means no setup beyond enabling a flag and downloading a model.

Who should use this?

Privacy-conscious developers who want to experiment with AI without sending sensitive work to external servers. Developers in regulated industries or restricted network environments will find the offline mode valuable. Chrome and Edge users with compatible hardware (4GB+ VRAM, 16GB+ RAM) who want a simple, no-setup AI assistant will get the most from this.

Verdict

ChromeChat is a compelling proof of concept for local AI chat in the browser, but it's early stage. With only 14 stars, limited documentation, and no test coverage, it's not production-ready. The credibility score of 0.8999999761581421% reflects this immaturity. If you want to explore on-device AI or need privacy-first chat, it's worth trying, but expect rough edges and monitor the project as it develops.

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