CastReader adds text-to-speech to UWorld. Click play on any question explanation — it reads aloud with paragraph highlighting and natural AI voices. Study while commuting, exercising, or cooking.
Built for exam prep — study smarter, not just harder
UWorld is the gold standard for USMLE, NCLEX, Bar, and other professional exam prep. Each question comes with detailed explanations — often 500+ words of critical reasoning. But there's no audio option. You're stuck reading on a screen, which limits when and how you can study.
CastReader extracts only the explanation text — paragraphs, headings, and bullet points. It skips navigation buttons, question numbers, answer choices UI, and other interface elements that don't belong in audio.
Each paragraph highlights as it's read aloud. Click any paragraph to jump there. The page auto-scrolls to follow along — perfect for visual reinforcement while listening.
Send audio to your phone via Telegram and listen to UWorld explanations during your commute, at the gym, or while doing chores. Turn dead time into study time.
Free to use, no signup. You're already paying for UWorld — CastReader adds audio at no extra cost. Upgrade to CastReader Pro for premium voices, more listening hours, and AI document analysis.
UWorld is the most trusted question bank for medical, nursing, legal, and financial exam prep. Whether you're studying for the USMLE Step 1, NCLEX-RN, Bar Exam, or CPA, UWorld's detailed explanations are what set it apart from competitors. Each question explanation breaks down the reasoning, covers related concepts, and includes educational tables — often running 500-1,000 words per question.
The challenge: UWorld has no built-in audio feature. Every minute of studying means sitting in front of a screen reading text. For students who spend 6-8 hours a day on exam prep, this creates eye strain, fatigue, and wasted commute time. Many students wish they could listen to explanations while walking, driving, or exercising.
CastReader solves this by adding intelligent text-to-speech directly to UWorld's web interface. Install the free Chrome extension, open any UWorld question, and click play. CastReader reads the explanation aloud with natural AI voices in 40+ languages, highlighting each paragraph as it goes. You can follow along visually or just listen.
The integration is smart about what it reads. UWorld pages contain navigation elements, answer choice buttons, performance metrics, and other UI that shouldn't be read aloud. CastReader's extraction engine identifies the explanation content and reads only the educational text — paragraphs, headings, lists, and key takeaways.
For maximum study efficiency, use CastReader's Send to Phone feature. Start reading an explanation on your computer, tap the phone icon, and continue listening on your phone via Telegram. This turns your commute, gym session, or household chores into productive study time — perfect for the months-long marathon of exam preparation.
Everything about UWorld text to speech
No, UWorld does not have a built-in text-to-speech feature. CastReader adds TTS to UWorld's web interface as a free Chrome extension. It reads question explanations aloud with natural AI voices and paragraph highlighting.
UWorld does not offer audio versions of its question explanations. CastReader fills this gap by converting any UWorld page into audio with intelligent content extraction that reads only the explanation text.
Yes. Install CastReader, open any UWorld USMLE question, and click play. CastReader reads the explanation aloud, skipping UI elements like answer buttons and navigation. Works with Step 1, Step 2 CK, and Step 3 content.
Yes. CastReader works with all UWorld question banks including NCLEX-RN, NCLEX-PN, USMLE, COMLEX, Bar Exam, CPA, CFA, and more. It reads any text content on the UWorld web platform.
CastReader works on desktop Chrome and Edge browsers. For mobile listening, use the Send to Phone feature — start reading on your computer and stream the audio to your phone via Telegram.
Yes — CastReader is free to use, no signup. You're already paying for your UWorld subscription, so CastReader adds audio at no extra cost. CastReader Pro (optional) adds premium ultra-realistic voices, more listening hours, voice cloning, and AI document analysis.
CastReader's smart extraction focuses on the explanation text — the detailed reasoning, educational content, and key takeaways. It skips answer choice buttons, navigation elements, and performance metrics.
CastReader supports 40+ languages with natural AI voices. While UWorld content is primarily in English, CastReader can read any language and automatically selects the appropriate voice.
Yes. CastReader lets you adjust the reading speed from 0.5x to 3x. Many students prefer 1.5x-2x speed for review sessions to cover more material in less time.
Yes. CastReader works on any UWorld page that contains text, including self-assessment exams, practice tests, and review modes. It reads the explanation content after you submit your answer.
With CastReader's Send to Phone feature, you can stream UWorld explanations to your phone and listen during your commute. Review the explanations for questions you've already answered — turning drive time into study time.
CastReader works with UWorld's web interface (accessed through Chrome or Edge browser), not the mobile app. For the best experience, use UWorld in your desktop browser with CastReader installed.
How TTS helps students study more effectively
Have a tough explanation broken down in your language
Why listening beats re-reading when focus drifts
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硬数据 —— 不是 vibe —— 来自权威来源
effect size 0.35
22 篇研究的 meta 分析显示 TTS 对阅读障碍学生的理解力提升幅度（Wood, Moxley, Tighe & Wagner, Journal of Learning Disabilities, 2018）
Source →下方每一条 Chrome Web Store 评论都可以在卡片链接处验证。我们不藏负面反馈 —— 我们 24 小时内回复。
“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
CastReader 创始人 Yan Xu 48 小时内回复：承认问题，下个版本上线了 bookmark 功能。这条评论的反馈直接推动了 v1.2 路线图。
“Need to highlight text and select it.”
“Hard to select text.”
↪ Founder reply
CastReader 创始人 Yan Xu 24 小时内回复：道歉、询问发生的网站/浏览器、提供键盘快捷键作为绕过方案、留下 support@castreader.ai 直接支持邮箱。
我们持续测试、改写、上线。每条更新都带真实日期。
用 verbatim Chrome Web Store testimonial、真实有声书市场数据、12 工具实测的 methodology 重写落地页。每条主张都有来源链接。
Telegram 音频流现在能稳定自动翻页，覆盖 Kindle Cloud Reader 和 Apple Books。内部测试显示会话中断减少约 70%。
写了 OCR 管线的深度文章：CastReader 如何处理 Amazon 每本 Kindle 书 184 套随机字母表和 361 个独特 glyph。发表在 dev.to。
原生 macOS 应用，朗读 Kindle for Mac，词级高亮。浮窗播放器 + 系统级快捷键。不需要浏览器。
Daily 榜 #10，99 upvotes，4 条社区评论推动了 v1.2 路线图。
从旧 TTS 引擎切换到 Kokoro 神经网络语音。用户评论从 'usable but robotic' 转为 'enjoy listening for hours'（来自 patrick chiang 的 Chrome Web Store 评论原话）。
英文 Kindle 书的 OCR 成功率从 78% 提升到 89%。加入了多栏页面检测（学术 PDF 适用）。
我做 CastReader 是因为我有几百本 Kindle 书，想在晨跑时听它们，但不想为每本再买 Audible 版。技术问题 —— Amazon Cloud Reader 的字体加密 —— 最后用 OCR 解决了。产品问题 —— 让它在手机、桌面、40+ 语言上真正好用 —— 花了两年迭代。我们是个小团队。我亲自回复每一条 Chrome Web Store 评论（上方 testimonials 里有证明 —— 包括 3 星和 1 星的）。如果有什么坏了或缺失，邮件 support@castreader.ai。
—— Yan Xu, 创始人
最近审阅: · CastReader 团队 —— 基于 2025 测试数据
Free to use. No signup. Turn every UWorld explanation into audio.
★★★★★ 4.7 · Free to start · No login · Optional Pro
