Bopomofo Reader

Learn Taiwan Mandarin with Bopomofo (Zhuyin ㄅㄆㄇㄈ). Dictionary, PDF reader, TTS, spaced-repetition flashcards & TOCFL levels.

Bopomofo Reader - Smart Bopomofo Annotations for Chinese Web Pages Stop breaking your reading flow to check pronunciation and meaning. Bopomofo Reader combines annotation, dictionary, translation, reading analysis, and spaced-repetition vocabulary learning in one seamless workflow. Built for academic papers, technical docs, news, original books, and PDF documents with horizontal or vertical Chinese text. ✨ Key Features: • Auto-detect Chinese characters and show Bopomofo pronunciation • Enhanced bopomofo-pro with modern dictionary and 600+ polyphonic word corrections • Whole-page Bopomofo mode - show all pronunciations at once • Hover tooltip with pronunciation and speak button • Hover dictionary supports multiple meanings and 8 definition languages (EN/JA/KO/VI/FR/DE/ZH/繁中) • Select text to read aloud with karaoke-style word highlighting • Instant translation of selected text (Bing & Google Translate) • Right-click menu and keyboard shortcuts for quick access • Multiple Bopomofo styles - with or without tone marks • Support for CJK Extension A and compatibility characters • Adjustable bopomofo annotation size (50 %–200 %) for web pages • Built-in PDF Reader with per-character Bopomofo overlay • Auto-intercept web PDFs — open any online PDF with Bopomofo annotations 🔊 Text-to-Speech: • Chinese (Traditional, Taiwan) voice with synchronized character-by-character highlighting • Single character — click the speaker button to hear pronunciation • Select text to speak with karaoke highlighting (floating toolbar or Alt+Shift+S) • Adjustable speech rate for sentence reading practice 🌐 Translation: • Select any text and click translate button or press Alt+Shift+T • Supports Bing Translate and Google Translate engines • 108 target languages available • Inline translation bubble with copy button 📖 Sentence Mode & Reading Analysis: • Right-click selected text → Sentence Mode: break down vocabulary with bopomofo + definitions • One-click save unfamiliar words to vocabulary list • Reading Analysis panel — analyze full-page text difficulty and vocabulary distribution • Alt+Shift+E shortcut to open Sentence Mode instantly ⌨️ Keyboard Shortcuts: • Alt+Shift+B - Toggle Bopomofo annotations on/off • Alt+Shift+S - Speak selected text • Alt+Shift+T - Translate selected text • Alt+Shift+E - Open Sentence Mode 📄 PDF Reader: • Built-in PDF viewer with smart Bopomofo annotation for every Chinese character • Auto-intercept online PDFs — adds Bopomofo to any PDF you open in the browser • Full annotation — bopomofo for every character, no skipping; zoom in to enlarge compact text • Horizontal & vertical text layout support — auto-detects text direction per page • Click any character for instant dictionary lookup (CEDICT with 114K entries) • Web pages and the PDF Reader share the same definition language setting • Show or hide Bopomofo annotations with the toolbar toggle • Text search in PDF • Sidebar with table of contents, thumbnails, and page navigation • 3 themes: dark, light, sepia • Drag & drop local PDF files or paste URLs 📝 Vocabulary Learning (SRS): • Save words from hover tooltip, Sentence Mode, or PDF Reader • Spaced-repetition review powered by FSRS algorithm • Extension icon badge shows due-for-review count (refreshed hourly) • Dedicated learning page with flashcard-style review • Export vocabulary as JSON or CSV for Anki and other tools 📚 Perfect for: • Chinese learners reading Chinese web pages • Learning pronunciation of unfamiliar characters • Sentence reading practice and TOCFL preparation • Quick translation without leaving the page • Building and reviewing Chinese vocabulary • Improving Chinese listening and speaking skills 🔒 Privacy: No data collection. Translation text is sent to third-party APIs (Bing/Google) only when you use the translate feature. All other processing is local.