Read faster and write better on social media

NanoCoffee brings AI-powered summaries and smart writing tools to Twitter/X, LinkedIn, and Substack. Powered by Chrome's built-in Gemini Nano - everything runs on your device for maximum privacy and speed.

Install from Chrome Web Store View on GitHub

Features

📝

Smart Summaries

Get instant AI-generated summaries of long posts, articles, and threads. Summaries appear inline, styled to match each platform.

✨

AI Writing Assistant

Generate contextual replies, rewrite drafts with different tones, adjust length and style on the fly. Edit and refine until it's perfect.

🎭

Tone & Style Control

Switch between casual and formal tones instantly. Make posts longer, shorter, or rephrase for clarity - all with one click.

🔒

Privacy First

All AI processing happens on your device using Gemini Nano. No data is sent to external servers. Works offline after setup.

⚡

Blazing Fast

On-device AI means instant results with no network latency. Summaries and rewrites appear in milliseconds.

🎨

Native Integration

Seamlessly blends into Twitter/X, LinkedIn, and Substack. Non-intrusive, clean interface that matches each platform.

How to Use

  1. Install the Extension

    Install from the Chrome Web Store. Requires Chrome 138+ stable.

  2. Visit Supported Platforms

    Navigate to Twitter/X, LinkedIn, or Substack. Long posts will automatically show summary boxes.

  3. Use AI Writing Tools

    Click the ✨ AI button in compose boxes to write or rewrite content. Gemini Nano will download automatically on first use (may take a few minutes).

System Requirements: Chrome 138+, 22 GB free disk space (for Gemini Nano model), GPU with 4+ GB VRAM or CPU with 16+ GB RAM. Desktop only (Windows 10+, macOS 13+, Linux).

Supported Platforms

Twitter / X
LinkedIn
Substack

Frequently Asked Questions

Is my data private?

Absolutely! All AI processing happens on your device using Chrome's built-in Gemini Nano model. Your content never leaves your device - no data is sent to external servers, and nothing is stored.

What writing features are available?

NanoCoffee can generate contextual replies to posts, rewrite your drafts for clarity, adjust tone (casual/formal), and make posts longer or shorter. All tools work directly in the compose boxes on Twitter/X, LinkedIn, and Substack.

Which Chrome version do I need?

You need Chrome 138+ stable. Gemini Nano will download automatically on first use. Make sure you have at least 22 GB free disk space.

Can I add support for other platforms?

Yes! NanoCoffee is designed to be extensible. Check out the GitHub repository for instructions on adding new platforms.

Is this free?

Yes, NanoCoffee is completely free and open source.