Read Aloud EPUB
Turn ebooks into audio you can follow. Upload an EPUB and listen with natural AI voices while reading along with synchronized highlighting, auto-scrolling, and chapter navigation. Keep your place, pick up where you left off, and finish more books with less screen time.
Natural AI voices
Enjoy voices that sound natural and stay pleasant even during long chapters.
- A wide range of voices across major languages
- Multilingual voices for mixed-language ebooks
- Switch voices and adjust speed anytime
Chapter navigation
Move through your book with structure.
- EPUB keeps chapters and sections, so you can jump to the part you want without losing your place.
- Helpful for textbooks, long novels, and chapter-based learning.
Table of Contents
Text Highlight
Follow along as it reads.
- Sentences highlight in real time while the page automatically scrolls to the current text.
- Stay focused during long reading sessions and return to any passage easily.
Reading and listening simultaneously creates a powerful learning experience that enhances comprehension and retention.
Our synchronized highlighting keeps your eyes on the text while your ears take in the information.
Smart Speed Control
Listen faster or slow down to learn.
- Choose from convenient presets (0.75x, 1.5x, 2.5x) or fine-tune to your exact preference.
- Speed up for quick reading or slow down for complex chapters and new vocabulary.
Playback Speed
Cloud Library Sync
Pick up where you left off.
- Your listening progress is saved so you can continue later without searching for your last chapter.
- Progress indicators help you track books in your personal library.
Multiple File Formats
More than ebooks.
- Readio supports PDF, EPUB, DOCX, TXT, and more so you can listen to documents, ebooks, and drafts in one place.
- Use one library for reading and listening across formats.
How to Read Your EPUB Aloud
Upload your ebook, choose a voice, and press play. Highlighting and chapter navigation help you stay on track.
Upload Your EPUB
Drag and drop any EPUB file into Readio. Great for books, textbooks, and structured reading.
Select Voice
Choose a natural AI voice and adjust speed, language, and preferences anytime.
Listen
Press play and follow along with highlighting and chapter navigation. Pause and continue later whenever you want.
Who uses Readio
Listen to ebooks so you can read more, stay focused, and keep your place without staring at the screen.

Book lovers
Listen to novels and nonfiction while commuting, doing chores, or relaxing at home.

Language learners
Improve comprehension by listening while following highlighted text. Adjust speed and replay any section.

Accessibility
Reduce eye strain and make long books easier to consume. Listen at your own pace with clear voices.
Frequently asked questions
Ready to start?
Start listening in seconds.
Upload your EPUB and start reading aloud right away.