Listen to any web page
Read aloud articles, PDFs, and selected text with natural AI voices. Word-by-word highlighting keeps you focused.
The human brain processes spoken language faster than written text. This efficiency is one reason why audiobooks and text-to-speech tools have seen such rapid growth in recent years. Listening lets you absorb information while commuting, exercising, or doing household tasks.
Text-to-Speech
Read any page, PDF, or text selection aloud. Select text and press play, or read the entire page.
Premium AI Voices
28 natural-sounding English voices processed entirely on your device. No cloud, no limits, no latency.
Word Highlighting
Follow along word-by-word in the transcript as you listen. Click any word to seek.
OCR for Images
Drag, paste, or upload images to extract text and read it aloud. Great for screenshots.
AI Summarization
Get brief summaries of any page or selection before listening. Toggle summarize mode on or off.
Keyboard Shortcuts
Control playback without leaving the page. Configurable shortcuts for play, pause, and stop.
Works right on the page
Select text, press play, and follow along with word-by-word highlighting — without leaving the page.
The Science of Listening
How audio transforms the way we learn and retain information
Dr. Sarah Chen
Feb 5, 2026 · 8 min read
The human brain processes spoken language faster than written text. This efficiency is one reason why audiobooks and text-to-speech tools have seen such rapid growth in recent years.
Listening lets you absorb information while commuting, exercising, or doing household tasks — turning dead time into learning time.
Research from the University of Waterloo found that participants who listened to content while following along with highlighted text showed 28% better retention compared to reading alone...
This efficiency is one reason why audiobooks and text-to-speech tools have seen such rapid growth in recent years.
How it works
Install the extension
Add readox to Chrome. Free to start, no account required.
Select text or open the sidepanel
Highlight text on any page or PDF, or open the sidepanel to read the entire document.
Press play and listen
Hear the text read aloud with word-by-word highlighting in the transcript.
Simple pricing
Start free. Upgrade for premium AI voices.
Free
Get started with browser TTS
- ✓Browser TTS voices
- ✓Read selected text
- ✓Read entire page
- ✓PDF reading
- —28 premium English AI voices
- —Word-level highlighting
- —Click-to-seek in transcript
- —AI summarization
- —OCR for images
- —Unlimited characters
Pro
Premium voices and AI features
$72/year
Upgrade to Pro- ✓Browser TTS voices
- ✓Read selected text
- ✓Read entire page
- ✓PDF reading
- ✓28 premium English AI voices
- ✓Word-level highlighting
- ✓Click-to-seek in transcript
- ✓AI summarization
- ✓OCR for images
- ✓Unlimited characters