castreader

A practical workflow

1. Install CastReader extension, open a Google Doc, and click the CastReader icon to start reading aloud with paragraph highlighting.
2. Use the Read This to Me guide to paste text, open a webpage, or choose the extension Reader or mobile app for a local document.
3. Use Read & Explain to keep the source visible while spoken guidance, subtitles, and pen marks show what the explanation refers to.

Based on the sources below. Editorial review does not imply hands-on product testing.

Candidates based on category and primary feature. Check feature and pricing differences before switching.

What changed

Changes to the facts recorded here, not a live scan of every vendor update. Save this tool to follow updates in your account.

1. 9/13/2026

   Updated: best for, export formats, features, integrations, summary, use cases, walkthrough

   See recorded changes

   bestFor

   Before: ["Users who want to listen to webpages, PDFs, Kindle books, and AI answers in multiple languages with synced highlighting."]

   After: ["Users who want to listen to webpages, PDFs, Kindle books, AI answers, and Google Docs with natural AI voices and synced highlighting.","Users needing to listen to Google Docs aloud with natural AI voices and paragraph highlighting without complex setup."]

   exportFormats

   Before: []

   After: ["Supports reading local documents in PDF, EPUB, Word, and TXT formats with private voice cloning."]

   features

   Before: ["Reads webpages, PDFs, Kindle books, and AI answers aloud with synced highlighting.","Google Docs-aware text extraction that reads the entire document aloud with paragraph-level highlighting, bypassing Canvas rendering issues.","Paragraph-level highlighting and auto-scrolling during read aloud for better tracking."]

   After: ["Reads webpages, PDFs, Kindle books, and AI answers aloud with synced highlighting.","Read & Explain feature that talks through difficult passages and points back to the source.","Developer Voice API for private voice cloning and English text-to-speech integration via REST API."]

   integrations

   Before: ["Integrates with Kindle Cloud Reader by reading visible text without replacing the original reading page."]

   After: []

   summary

   Before: "CastReader is a text-to-speech software that reads webpages, PDFs, Kindle books, and AI answers aloud with synced highlighting in multiple languages. It supports private voice cloning, offers a mobile app, and includes a Google Docs-aware reading mode that bypasses Canvas rendering limitations."

   After: "CastReader is a text-to-speech software that reads webpages, PDFs, Kindle books, and AI answers aloud with synced highlighting in multiple languages. It supports private voice cloning and offers a mobile app for iPhone and Android to listen on the go."

   useCases

   Before: ["Listening to Google Docs documents aloud with natural AI voices and synced highlighting for proofreading or multitasking.","Reading difficult passages with explanations that talk through the content and point back to the source."]

   After: ["Listening to Kindle books on mobile devices with synced highlighting and resume progress."]

   walkthrough

   Before: ["Install CastReader extension, open a Google Doc, and click the CastReader icon to start reading aloud with paragraph highlighting.","Use the Read & Explain feature to have difficult passages explained with spoken guidance, subtitles, and pen marks pointing to the source.","Use the mobile app on iPhone or Android to listen to Kindle books with synced highlighting, resume progress, and background playback."]

   After: ["Install CastReader extension, open a Google Doc, and click the CastReader icon to start reading aloud with paragraph highlighting.","Use the Read This to Me guide to paste text, open a webpage, or choose the extension Reader or mobile app for a local document.","Use Read & Explain to keep the source visible while spoken guidance, subtitles, and pen marks show what the explanation refers to."]