What's newJust shipped v2.0
Read aloud anything with Readio
Listen to web pages, EPUB books, or PDFs in lifelike voices powered by OpenAI. Whether you're learning, multitasking, or relaxing, your reading is now hands-free.
OpenAI Text-to-Speech voices
Experience the most natural OpenAI tts voices today. Our advanced neural networks generate lifelike speech with perfect intonation, ensuring top-tier performance.
- Natural-sounding speech with perfect intonation
- 6 unique voices with distinct characteristics
- Multilingual support across 50+ languages
Alloy HD
balanced, neutral, versatile
Echo HD
clear, steady, straightforward
Fable HD
narrative, warm, storyteller-like
Onyx HD
deep, strong, resonant
Nova HD
bright, friendly, approachable
Shimmer HD
light, crisp, expressive
Explore Our Natural-Sounding AI Voices
Discover expressive and nuanced voices that can fluently read AI text out loud. Choose voices by style, speed, or regional accent across 140+ languages and dialects.
Popular Languages
English (US)
English (UK)
English (Australia)
English (India)
English (Canada)
English (Ireland)
English (New Zealand)
English (South Africa)
Spanish (Spain)
Spanish (Mexico)
Spanish (Argentina)
Spanish (Colombia)
French (France)
French (Canada)
French (Belgium)
French (Switzerland)
German (Germany)
German (Austria)
German (Switzerland)
Portuguese (Brazil)
Portuguese (Portugal)
Chinese (Simplified)
Chinese (Traditional)
Chinese (Hong Kong)
Japanese (Japan)
Korean (South Korea)
Hindi (India)
Arabic (Saudi Arabia)
Hebrew (Israel)
Russian (Russia)
Italian (Italy)
Dutch (Netherlands)
Polish (Poland)
Turkish (Turkey)
Swedish (Sweden)
Danish (Denmark)
Finnish (Finland)
Norwegian (Norway)
Indonesian (Indonesia)
Malay (Malaysia)
Vietnamese (Vietnam)
Thai (Thailand)
Frequently asked questions
Readio is a TTS reader that can read aloud web pages, EPUBs, and PDFs using realistic OpenAI voices. It’s designed to make reading more accessible and enjoyable anywhere, on any device.
Install the Readio extension from the Chrome Web Store. After logging in, you can instantly let Readio read any web page aloud with natural AI voices.
To read EPUB or PDF files, create a free Readio account and upload your files on our website.
Free users can upload files up to 50 MB in size. For larger uploads, you can upgrade to a paid plan.
Readio uses OpenAI and Azure voices to deliver clear, natural, and expressive speech across multiple languages.
Readio supports over 140 languages, allowing you to listen to EPUBs, PDFs, and web content in almost any language.
Yes, Readio is free to use. Every month, we provide a free usage quota so you can enjoy AI-powered reading at no cost.
The free plan includes limited monthly usage and access to standard voices. The paid plan offers 500,000 characters per month with premium voices and unlimited access to standard voices once the quota is used.
Yes, our text-to-speech voice generator is 100% free, requires no registration, and can be used without limits.
Yes, our website is fully mobile-responsive. You can upload and listen to EPUB and PDF files directly from your mobile phone.