Free AI Chat That Runs Entirely in Your Browser
Free online AI chat with zero signup: talk to an AI model running 100% on your device (Chrome built-in AI or a local WebAssembly model). Private by design.
About AI Chat (Local)
AI Chat is a free conversation tool with a difference: the AI model runs on your own device, not on a server. You can use Chrome's built-in Gemini Nano when it's available, or switch to an open model compiled to WebAssembly, which works in any modern browser. Pick the model that suits you: LFM2.5-230M (fastest), LFM2.5-350M (best balance), Qwen3.5-0.8B (strong general quality), or MiniCPM5-1B (largest, best for non-European languages). The WebAssembly model is downloaded once from Hugging Face and cached in your browser's storage — after that it loads instantly, even offline. Your conversations never leave your computer.
How to use AI Chat (Local)
- Pick an engine: Chrome's built-in AI (if available) or the local WebAssembly model, and choose which local model to use.
- Type a message and press Send — the first run downloads the chosen model once, then it is cached on your device.
- Keep the conversation going, or press Clear chat to start over. Replies are rendered with formatting: headings, lists, code blocks, and even math formulas.
Frequently asked questions
Is this AI chat really free?
Yes — free with no account, no signup, and no usage limits. The AI runs on your own hardware, so there is no server cost per message.
Are my messages sent to a server?
No. Both engines run completely on your device: Chrome's built-in model, or a WebAssembly model loaded into your browser. The only download is the model itself, once.
Why does the first message take a while?
The WebAssembly model (146–656 MB depending on which one you pick) must be downloaded once on first use. It is cached in your browser's storage, so later visits start instantly without re-downloading.
How good are these models?
They are small on-device models — great for quick questions, drafting, and casual chat, but not as capable as large cloud models. The trade-off is total privacy.
Does it support Markdown and math formulas?
Yes. Replies are rendered as rich text: headings, bold/italic, lists, tables, code blocks, and LaTeX math ($x^2$ inline, $$…$$ as display equations). You can ask the model to 'answer with formulas' and they will render properly.
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