CastReader for Safari
Read aloud with highlights
Only for Mac
Free · In‑App Purchases
Mac
Read webpages, PDFs and EPUBs aloud with synced highlights and auto-scroll. Get AI explanations on the page.
CastReader is a text-to-speech extension for reading webpages, PDFs and EPUB books aloud in Safari. Natural voices, synchronized word and paragraph highlighting, and automatic scrolling help you follow long articles with your eyes and ears together.
Use AI Explain when a passage is difficult. It marks key ideas and explains them on the original page, so you can compare the explanation with the source as you read.
What you can do
- Webpages: read long articles, study materials and technical documentation on the original page.
- PDF and EPUB: open files in CastReader’s document reader and follow the text as it is spoken. EPUB files must be DRM-free and contain readable text.
- Reading controls: start at a chosen paragraph, adjust the speed, preview voices and save your favorites.
28 reading languages
Read in English and 27 other supported languages. The interface and reading tools support 28 languages; the text language is detected automatically and can be corrected. Choose the explanation language separately. Free and Pro voice choices vary by language.
Kindle Web compatibility depends on the book edition. Scanned documents require supported OCR and clear source images; OCR coverage differs from reading-language coverage.
Free and Pro
Start with 20 minutes of reading and 3 AI explanations per day for free. Pro offers more reading time and explanations, faster playback and additional voices. Cloned voices have separate usage allowances.
Privacy
Reading and explanations use online services to process the necessary content. Product usage and error statistics help improve the service. Privacy details: https://castreader.com/privacy-policy
Get started
1. Open a webpage or a compatible Kindle book.
2. Click CastReader or the headphone button.
3. For a PDF or EPUB, choose Read a file and select the document in CastReader’s reader.
4. Choose Read Aloud or Explain.
5. Listen while following the highlighted text.
On supported webpages, Fix reading lets you select the text yourself or ask AI to adjust the reading content.
On your Mac, open CastReader, enable it in Safari > Settings > Extensions, and allow access to the websites you want to read.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Subscribe to Pro monthly or yearly in the Mac app, or restore purchases, without a CastReader account. Sign-in is optional for syncing Pro across devices. Payment is charged to your Apple Account at the price shown before purchase. Subscriptions renew automatically unless canceled at least 24 hours before the current period ends. Manage or cancel in your Apple Account settings.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Version 1.2.60 brings 28-language reading tools, improved voice browsing, smoother playback and PDF/EPUB highlighting. We also fixed Safari extension sign-in and updated the app icons.
The developer, ohsame Inc, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Contact Info
- User Content
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Shanghai Baozi Information Technology Co., Ltd.
- Size
- 45.2 MB
- Category
- Productivity
- Compatibility
Requires macOS 14.0 or later.
- Mac
Requires macOS 14.0 or later.
- Mac
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- CastReader Pro Yearly $59.99
- CastReader Pro Monthly $9.99
- Copyright
- © 2026 Shanghai Baozi Information Technology Co., Ltd.