Readio

Readio is an AI-powered text-to-speech platform that turns written content into lifelike audio. Listen to webpages, PDFs, and ebooks with natural AI voices designed for long-form reading—so you can learn and work hands-free.

A key feature is follow-along playback: as your document is read aloud, sentences are highlighted in sync with the audio and the page scrolls automatically. That keeps text and sound aligned, making it easier to stay on track and never lose your place.

Readio also offers content control to tailor what you hear. Built-in smart content filtering can skip elements such as footnotes, superscripts, and bracketed text, and you can manually select sections to exclude. For navigation, you can adjust playback speed, move between sections, and jump to specific parts of a document.

You can upload documents in widely used formats like PDF, EPUB, and DOCX without changing their structure. Readio supports 140+ languages and accents, including multiple English variants (US/UK/Australia/Canada/Ireland/New Zealand) and many other languages.

Free users can access monthly characters for free, and you can view pricing to upgrade for more listening capacity.

What can I read aloud with Readio?

You can read webpages, PDFs, and ebooks with natural AI voices designed for long-form listening.

How does the synced highlighting work while Readio reads my content?

As your document is read aloud, sentences are highlighted in sync with the audio and the page scrolls automatically, helping you follow along without losing your place.

Can I control what parts of a document get spoken?

Yes. Smart content filtering can skip items like footnotes, superscripts, and bracketed text, and you can also manually select sections to exclude from reading.

Which file formats does Readio support?

Readio works with formats such as PDF, EPUB, and DOCX (along with other common document types listed on the site).

What languages and voices are available in Readio?

Readio provides natural AI voices across 140+ languages and accents, with multiple voice options and distinct voice characteristics.

Is Readio free to use?

Free users receive monthly characters. To listen beyond the free allowance, check the pricing options for paid plans.