Hearline — Listen to any webpage

What is Hearline?

Hearline is a free Chrome Extension that reads any webpage out loud while highlighting each word in real time. Think of it like a karaoke cursor for the web. It was built for students, professionals, and anyone who learns better by listening.

No account required. No data sent anywhere.

Chrome - Browsers White Mode

Features

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  Read aloud — reads any page or selected text out loud using your browser's built-in voice
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  Real-time highlighting — follows along and highlights each word as it is spoken
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  RSVP speed reading — flashes one word at a time on screen, up to 3x faster than normal reading
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  Smart summarizer — pulls out the key points from any page instantly, no AI or internet needed
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  100% private — everything runs inside your browser, nothing is sent to any server
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  Works everywhere — articles, blogs, Wikipedia, course pages, and documentation sites

How to Install

How to Use

Privacy & Architecture

Hearline runs entirely on your device. It uses your browser's built-in Web Speech API to generate voice, so no text is ever sent to any server. There is no account to create, no data collected, and no analytics of any kind.

Your reading stays completely private.

Tech Stack

File Structure

hearline/
├── manifest.json       # Extension configuration
├── background.js       # Service worker
├── content.js          # Core engine (extract, chunk, speak, highlight)
├── injected.css        # Highlight and player styles
├── popup.html          # Extension popup interface
├── popup.css           # Popup styles
└── popup.js            # Popup controls and messaging