What is Readio?
Readio enables users to listen to web pages, PDFs, and e-books (EPUB) with natural AI-generated speech, supporting over 140 languages and accents. With real-time highlighting and synchronized scrolling, combined with smart content filtering and fine-grained playback controls, it delivers a focused, efficient, hands-free reading experience.
Key features
It supports six distinctive AI voices (Alloy, Echo, Fable, Onyx, Nova, Shimmer), each with a clearly defined vocal tone—for example, Fable offers a warm, narrative voice, while Nova provides a bright, friendly tone. All voices are generated using advanced neural networks, delivering perfect intonation and natural pauses.
The tool features real-time sentence-by-sentence highlighting and automatic page-turning, ensuring strict synchronization between speech and text. Its built-in intelligent filters can skip distracting elements such as footnotes, superscripts, and bracketed text, and it also allows users to manually designate areas not to be read aloud.
Use cases and audience
This tool is ideal for users who require accessible reading, language learning, or multitasking—such as listening to documents during commutes or household chores—as well as learners and professionals who demand high-quality natural-sounding speech, multilingual support, and precise text synchronization.
- Listen to web pages, PDFs, and e-books in over 140 languages—perfect for extended listening-based learning and hands-free scenarios.
- Real-time highlighting and synchronized reading aloud help you focus on long texts and prevent mind-wandering.
- Intelligently filters footnotes, superscripts, and text within parentheses, with customizable reading ranges as needed.
Web page URLs, PDF files, EPUB files, DOCX files
Natural AI-generated audio for voice reading, paired with real-time highlighted text and automatic page scrolling
Frequently asked questions
How many languages does Readio support?
Supports over 140 global languages and dialects, including American English, British English, Australian English, German, French, Italian, Spanish, Japanese, Korean, Danish, and more.
Is Readio free?
Offers a free trial; full features require a paid subscription plan—see the Pricing page for details.
How to use
- 01
Visit readiolabs.org and click “Try for free” to start using it at no cost.
- 02
Upload PDF, EPUB, or DOCX files, or paste a webpage URL.
- 03
Choose one of six natural AI voices (such as Alloy, Nova, or Fable) and select your target language.
- 04
Click Play to listen in real time while the highlighted text scrolls along, with controls like speed adjustment and skip functions.
Pricing and availability
The official website does not disclose specific pricing, subscription durations (monthly or annual), word/character limits, commercial licensing scope, or free-tier allowances. It only displays “View Pricing” and “Get Started for Free,” with no available pricing details.
- Pricing source
- https://readiolabs.org/
- Pricing last updated
- 2026-10-31
Prices and limits may change. Check the official website for current terms.
Official website & sources
Updated on 2026-10-31
