CastReader: Text to Speech

CastReader is a text to speech reader for your PDFs, ebooks and web articles. Listen while following highlighted text, then use AI explanations to work through difficult passages.

READ ALOUD — STAY FOCUSED

Turn photos, web pages, PDFs, EPUBs, and plain text into natural speech. Synchronized highlighting and auto-scroll keep your eyes and ears on the same sentence, whether you are studying, commuting, exercising, or resting your eyes.

AI EXPLAIN — GO BEYOND THE WORDS

CastReader creates and reads a clear explanation while handwritten-style annotations appear on the original: highlights for key points, circles around important terms, and numbered steps. Listen, watch, and understand the structure of difficult material.

BRING YOUR OWN CONTENT

- Camera or photo: recognize text on-device
- Web: open a URL and start listening
- Files: PDF, EPUB, TXT, DOCX, and images
- Paste: turn copied text into speech instantly
- Kindle: connect your Kindle library and continue reading
- Listen to YouTube: share or paste a public video link and hear its public captions with synchronized highlighting

For Listen to YouTube, only public videos with accessible captions are supported. Videos requiring sign-in, age verification, membership, regional access, or private access cannot be read. CastReader does not play, download, or retain YouTube video or audio streams; speech is generated from caption text. CastReader is not affiliated with or endorsed by YouTube.

BUILT FOR

- Readers who want to finish articles, documents, and ebooks by listening
- Language learners who want synchronized visual guidance
- Students and professionals working through dense material
- Anyone who needs eye relief or accessibility support

28 LANGUAGES

Read and listen in English, Chinese, Japanese, Spanish, French, German, Brazilian Portuguese, Italian, Hindi, Dutch, Korean, Arabic, Russian, Polish, Swedish, Danish, Norwegian, Finnish, Czech, Greek, Hungarian, Filipino, Hebrew, Indonesian, Malay, Romanian, Turkish, and Vietnamese. The interface is localized in all 28 languages. Voice choices and voice cloning support vary by language.

FREE AND CASTREADER PRO

Use CastReader free every day. Choose a monthly or annual Pro subscription for unlimited reading with standard voices, unlimited AI explanations, premium voice access, and playback speeds up to 3x. Cloned voices require Pro and use a separate allowance: 120 minutes per monthly allowance period. Optional 120-minute top-up packs add cloned-voice time without extending Pro. Local prices, billing periods, and renewal terms are shown in Google Play before purchase.

Dark mode and background playback are supported. Photo text recognition runs on-device; some languages require an initial model download, and accuracy varies with language and image quality. Photos are not uploaded for text recognition. Reading history stays on your device.

ON PHONES AND TABLETS

Enjoy CastReader on Android phones and tablets. Adaptive navigation and spacious reading layouts adjust to portrait or landscape, giving your books, read-aloud controls, and AI explanations more room on a larger screen.

Recent changes:
Faster, smoother AI explanations with shorter audio sections. Improved O’Reilly highlighting, scrolling and playback across chapters. Reduced waits when starting or resuming explanations.
Open downloaded Kindle books offline from Home or your bookshelf. Offline listening uses your device’s system voices.