About This Site
Text-to-speech reader for webpages, PDFs, Kindle books, and AI answers CastReader is a text-to-speech and reading-assistance tool available as a browser extension and mobile app. It reads webpages, PDFs, Kindle books, ebooks, documents, emails, and AI responses aloud with synchronized highlighting and auto-scroll. Its Read & Explain feature helps users understand difficult passages through spoken explanations, subtitles, and annotations while keeping the original source visible. CastReader supports multiple languages, including German, and works across supported Chrome, Edge, Firefox, iPhone, iPad, and Android workflows.
Alternatives
ChatTTS Site
Open-source text-to-speech project for realistic dialogue generation.
ChatTTS is an open-source text-to-speech project designed for generating realistic audio, particularly for dialogue scenarios. It supports both Chinese and English and is trained on a large dataset to produce human-like speech. It's suitable for applications like creating dialogue-based audio and video introductions and assisting large language model interactions.
speakperfect.co
AI-powered tool for creating perfect audio and scripts from speech, removing errors and filler words.
SpeakPerfect is a tool that allows users to create perfect audio and scripts from their speech. It uses AI to remove filler words, select appropriate words, and create a clear sentence structure. It also offers features like voice cloning, multi-language output, and content rewriting to help users create engaging content for marketing campaigns, online courses, and more.
Key Features AI
Core Features
Text-to-speech reading for webpages, PDFs, Kindle books, ebooks, documents, emails, and AI responses
Synchronized word or paragraph highlighting with automatic scrolling
Read & Explain for spoken summaries, explanations, subtitles, and source annotations
Kindle, WeRead, and O'Reilly browser reading with OCR and auto-advance
Per-response listening buttons for ChatGPT, Claude, Gemini, DeepSeek, Kimi, and Doubao
Read Selected Text through the browser context menu
Support for nine languages, including German
Natural and premium AI voices with playback speeds up to 3× on Pro
Mobile apps for iPhone, iPad, and Android
Upload support for PDF, Word, and TXT files
Reading voices with real samples through the CastReader Voice Hub
Advantages
Works across webpages, PDFs, Kindle books, documents, emails, and AI platforms
Synchronized highlighting helps users follow the text while listening
Read & Explain provides contextual guidance instead of only pronouncing words
Free tier is available without signup and includes 20 minutes of listening per day
Supports multiple languages and includes full German extension support
Offers Kindle listening workflows on browser and mobile
Includes natural voices, premium voices, and playback speeds up to 3× on Pro
Pro subscription includes a three-day free trial and can be canceled anytime
Stripe processes payments without CastReader handling card details
缺点：Free listening is limited to 20 minutes per day
缺点：Free users receive only three AI explains per day
缺点：Full ebooks, long PDFs, premium voices, and faster playback require Pro
缺点：Support depends on the specific website, browser, document, and reading workflow
缺点：Kindle browser reading relies on visible page text and OCR rather than replacing the original Kindle reader
缺点：Some platform and feature availability may vary across browser and mobile workflows
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