Open an accessible O’Reilly chapter for read-aloud in Chrome or Edge, or connect your reading history in the CastReader mobile app. Your personal or institutional access still applies.
Choose the browser or mobile workflow that matches your access.
Use your personal subscription or an institution-provided sign-in. A catalog listing alone does not grant access to a book.
The chapter adaptation skips code blocks and navigation. Some captions and table text can remain; keep diagrams and examples visible when studying.
Listen with highlighting on the supported chapter text. Site layout, book structure and loading state can affect extraction.
Use the original table of contents to select a chapter, wait for it to load and check the starting passage before playing.
CastReader on iOS and Android imports books you have opened on O’Reilly. It does not import the whole catalog or every playlist.
Install CastReader and open O’Reilly Learning in the same browser.
Use your personal account or institution’s normal access route. Open an actual book chapter and wait for the text.
Start CastReader, verify the passage and highlighting, then choose an available voice and speed. Resolve any access prompt on O’Reilly before continuing.
O’Reilly’s own mobile apps offer text-to-speech, as described in its <a href="https://www.oreilly.com/online-learning/support/accessibility">accessibility guidance</a>. Check the original app before choosing an additional reading workflow.
CastReader’s desktop extension reads supported book chapters in the original browser page. It skips code blocks and navigation; diagrams, formulas and complex tables may still need visual study. Video courses and recorded audiobooks are different content types.
On iOS and Android, connect O’Reilly in CastReader and complete personal or supported institutional sign-in. The imported list comes from books you have opened. If it is empty, open a book, return to reading history and sync again.
Follow the <a href="/integrations#source-oreilly">O’Reilly connection and reading-history steps</a>. The integration keeps provider entitlements and does not promise every institutional proxy, full-catalog import or cross-device reading progress.
Everything about O'Reilly text to speech
Yes. O’Reilly documents text-to-speech in its mobile apps. CastReader offers a separate browser workflow and a mobile reading-history connection.
Install CastReader in Chrome or Edge, complete your O’Reilly sign-in, open an accessible book chapter and start playback after the text loads.
The adaptation skips code blocks and navigation. It can retain captions and table text; diagrams, formulas and code examples may need visual review.
Supported chapters have continuous-reading handling. Loading, access prompts and layout changes can interrupt continuation; check the current passage and resolve provider prompts.
Supported institutional sign-in and proxy routes can work, but each institution’s configuration can differ. Use its normal authorized login; the integration does not grant new access.
Connect O’Reilly in CastReader on iOS or Android, open a book to populate history and sync that history. See the connection steps.
The connected list is book reading history. It does not import the entire catalog, every playlist, video courses or audiobooks.
O’Reilly access is separate from CastReader voice access. Check the current client and pricing for free limits, available voices and Pro features.
CastReader also works on Kindle Cloud Reader with OCR
Personal and institutional sign-in, history sync and mobile reading
Turn academic papers into audio for your commute
Read your Notion workspace aloud with CastReader
CastReader is available on iPad and Android tablets, with layouts adapted for a larger reading screen.
Hard numbers — not vibes — from authoritative sources
$2.22 billion
US audiobook sales in 2024, up 13% year-over-year (Publishers Weekly / Audio Publishers Association)
Source →51%
of US adults have listened to an audiobook in 2025 — roughly 134 million people (APA Consumer Survey 2025)
Source →2.2 billion
people globally with near- or far-vision impairment (WHO Fact Sheet, 2024). TTS is the primary access path for digital reading content.
Source →78%
of audiobook listeners multitask while listening — commute, chores, exercise (Audiolibrix Great Audiobook Survey, 2024)
Source →27.2 minutes
average single-trip US commute in 2024, up from 26.8 (US Census ACS via Statista). That's nearly an hour each day of audio-only time.
Source →effect size 0.35
measured comprehension lift from TTS for reading-disabled students across 22 studies (Wood, Moxley, Tighe & Wagner, Journal of Learning Disabilities, 2018)
Source →15.5 million
US adults with ADHD per CDC 2024 — about half diagnosed in adulthood (CDC MMWR, October 2024)
Source →Every Chrome Web Store review below is verifiable at the link in each card. We don't hide negative feedback — we answer it within 24 hours.
“This is 1 of the best TTS and its smooth. If this is truly free i'll keep this 100%. Every other TTS says its free but has a secret. They interrupt or they just say better ai voices pay. But i like this voice. I've tried loads and this is 1 of the best ones that actually says free.”
“Works perfectly on vivaldi. One suggestion though. I wish it had a play button appear next to a paragraph when we hover over it. Just like in the case of speechify.”
“Extremely user friendly short keys. Placed forward backward and speed up down as Natural as it could be. Voices are great and smooth. I would recommend it over many hyped products.”
“At the very least it's better than many paid TTS models. Still not as good as ElevenReader or LAP, but maybe the best free model for TTS.”
“So glad I can finally switch voices! The default was fine but I found one I actually enjoy listening to for hours. Small thing, huge difference.”
“Best one i found, user friendly, and great voice over.”
“ChatGPT's long answers are finally listenable. Let it generate while I listen — doubles my productivity. Love the inline button next to each response.”
“I tried using this add-on to listen to an ebook on the O'Reilly learning platform, and it works smoothly. However, it always restarts from the first paragraph whenever I scroll or select a different paragraph. Please consider adding a bookmark or checkpoint feature so users can mark where the reading should begin.”
↪ Founder reply
Replied by CastReader founder Yan Xu within 48 hours: acknowledged the issue, shipped a bookmark feature in the following release. Reviewer's verbatim feedback drove the v1.2 roadmap.
“Need to highlight text and select it.”
“Hard to select text.”
↪ Founder reply
Replied by CastReader founder Yan Xu within 24 hours: apologized, asked which site/browser the issue occurred on, provided a workaround using the keyboard shortcut, and offered direct support at support@castreader.ai.
We re-test, re-write, and ship continuously. Every entry has a real date.
Rewrote landing pages with verbatim Chrome Web Store testimonials, real audiobook market data, and tested-12-extensions methodology. Every claim now has a sourceable link.
CastReader provides native apps for iPhone and Android; Android downloads are available directly from Google Play.
Wrote up the OCR pipeline: how CastReader handles Amazon's 184 random font alphabets and 361 unique glyphs per Kindle book. Shared in dev.to.
The phone app flow now has its own landing page for bookshelf sync, Read Aloud, synced highlighting, auto-scroll, background playback, and resume progress.
Ranked #10 in Daily, 99 upvotes, 4 community comments shaped the v1.2 roadmap.
Switched from older TTS engines to Kokoro neural voices. User reviews shifted from 'usable but robotic' to 'enjoy listening for hours' (verbatim from review by patrick chiang).
OCR success rate improved from 78% to 89% on English-language Kindle books. Multi-column page detection added for academic PDFs.
I built CastReader because I owned hundreds of Kindle books and couldn't listen to them on my morning runs without buying separate Audible copies. The technical problem — Amazon's Cloud Reader font encryption — turned out to be solvable with OCR. The product problem — making it actually pleasant across different devices and languages — took two years of iteration. We're a small team. I answer every Chrome Web Store review personally (see testimonials above — including the 3-star and 1-star ones). If something's broken or missing, email support@castreader.ai.
— Yan Xu, founder
Last reviewed: · CastReader Team — reviewed against 2025 testing data
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