Listen to books, PDFs and articles in lifelike AI narration
Listen to books, PDFs and articles in lifelike AI narration
article2audio records 2,280 monthly visits with +99.1% month-over-month growth and Paid pricing. Readio records 12,402 monthly visits with +6.7% growth and Freemium pricing.

Turn PDFs and articles into audio that explains figures and tables
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | article2audio.app | readiolabs.org |
| Pricing Model | Paid | Freemium |
| Monthly Visits | 2.28K (2,280) | 12.4K (12,402) |
| MoM Traffic Delta | +1.14K (+99.1%) | +783 (+6.7%) |
| Primary Market & Share | 🇺🇸 United States (100%) | 🇺🇸 United States (38.2%) |
| Direct Visits / mo | 897 | 4.98K |
| User Rating | 4.2 | 4.2 |
| Supported Platforms | Website | Website |

Turn PDFs and articles into audio that explains figures and tables
Charts and diagrams are narrated as what they show rather than skipped or read as a bare figure number.
Instead of fifty cells read one by one, you hear the conclusion the table supports.
Running headers, footers and page numbers are left out, and headings get a pause so chapters sound continuous.
Upload PDFs up to 100 MB and 1,000 pages, paste article links or add saved HTML pages, all stored together.
Listen to PDFs, ebooks, and webpages in natural AI voices with synced highlighting.
As the document is read, sentences highlight in sync with the audio and the page scrolls automatically, so you never lose your place.
Six OpenAI TTS voices, including Alloy, Echo, Fable, Onyx, Nova, and Shimmer, cover neutral, narrative, and expressive styles for different content types.
Read in over 140 languages and dialects, with regional English, German, French, Spanish, and Chinese variants available.
Built-in filters skip footnotes, superscripts, and bracketed text, and you can manually exclude sections you do not want spoken.
Listen to books, PDFs and articles in lifelike AI narration
Listen to books, PDFs and articles in lifelike AI narration
Text to speech and voice AI across every device
Text to speech and voice AI across every device
Turn any text, PDF, image or book into lifelike AI speech
Free AI text to speech with 200+ voices in 70+ languages
Free AI text to speech with 200+ voices in 70+ languages

All-in-one AI speech, transcription, and voice cloning studio
All-in-one AI speech, transcription, and voice cloning studio
Listen to anything. Beautifully.
Listen to anything. Beautifully.

Natural AI text to speech with 910+ voices on web, iOS and Android
Natural AI text to speech with 910+ voices on web, iOS and Android

Turn any PDF into natural AI speech and listen anywhere.
Turn any PDF into natural AI speech and listen anywhere.
Turn PDFs, docs and web pages into natural-sounding audio you can listen to anywhere
Turn PDFs, docs and web pages into natural-sounding audio you can listen to anywhere

Free browser text-to-speech with natural neural voices
Free browser text-to-speech with natural neural voices
SpecialistListen to anything: articles, PDFs and newsletters as your own private podcast
SpecialistListen to anything: articles, PDFs and newsletters as your own private podcast

Turn any document into natural-sounding audio you can listen to anywhere
Turn any document into natural-sounding audio you can listen to anywhere