NanoSum

Your smart-browse assistant that summarizes, translates, and analyzes any webpage using 100% on-device AI.

Submission for the Google Chrome Built-in AI Challenge 2025.

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🚀 Demo

Watch the 2-minute demo video:(https://www.youtube.com/watch?v=eMdTws5NV3Y)

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🧐 What is NanoSum?

NanoSum is a Chrome Side Panel assistant built to solve information overload and time panic. For students and professionals who are overwhelmed by long articles before a test or a meeting, NanoSum provides a suite of on-device AI tools to learn or revise any topic in minutes.

Because it uses the on-device Gemini Nano model, your data and browsing history never leave your browser, ensuring 100% privacy.

✨ Features

NanoSum is a complete AI suite that uses all six of the core text-based, built-in AI APIs:

• 📜 Summarizer API: Instantly generates a clean paragraph summary and a formatted list of key points.
• 🌐 Translator API: Automatically translates any generated text into 7 different languages.
• 🖌️ Rewriter API: Rewrites the entire article's content to be simpler, more formal, or casual (e.g., "in less than 200 words").
• ✨ Writer API: Creatively generates new content (like a poem or song) based on the page's topic.
• ✔️ Proofreader API: Automatically proofreads your prompts before sending them to the AI, ensuring better results.
• 💬 Prompt API (LanguageModel): Answers in-depth, specific questions about the full text of the article.
• 📥 Export: Saves any AI-generated text to a .txt file for your notes.

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🛠️ Built With

• Google Chrome Built-in AI APIs:
  • Summarizer
  • Translator
  • Rewriter
  • Writer
  • Proofreader
  • LanguageModel (Prompt API)
• Chrome Extension Platform: Manifest V3, Side Panel API
• Core Tech: JavaScript (ES6+), HTML5, CSS3

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🔧 How to Install (for Hackathon Judging)

This extension uses experimental APIs and requires Chrome Canary.

1. Prerequisites

• Google Chrome Canary (Version 142+).
• Enable AI Flags: Go to chrome://flags and Enable the following two flags:
  • #prompt-api-for-gemini-nano
  • #optimization-guide-on-device-model
• Download the Model: After enabling the flags, go to chrome://components, find "Optimization Guide On Device Model", and click "Check for update". Restart your browser.

2. Installation

1. Download this repository as a .zip file and unzip it.
2. Open Chrome Canary and go to chrome://extensions.
3. Turn on "Developer mode" in the top-right corner.
4. Click "Load unpacked" and select the unzipped project folder.
5. Pin the NanoSum icon to your toolbar.

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💡 How to Use

1. Navigate to any webpage (e.g., a Wikipedia article).
2. Click the NanoSum icon in your toolbar to open the side panel.
3. Click "Summarize & Analyze" to get a summary and key points.
4. Use the "Translate to:" dropdown to auto-translate the result.
5. Use the "Advanced Actions" to:
   • Rewrite the content in a different style.
   • Proofread the original content.
   • Run Writer with a creative prompt (e.g., "write a poem").
   • Ask Prompt with a specific question (e.g., "What is Alan Turing's role?").