Instant Book Reader

Read your books on every new tab. Supports EPUB, PDF, and TXT with AI-powered features.

Open your books in every new tab. Instant Book Reader replaces Chrome's default new-tab page with a clean, distraction-free reader for your own EPUB, PDF, and TXT files. Drop a book in once and every new tab takes you back to where you left off — no app to launch, no website to load, no account required. Why install: • You read books across many short sessions and want a frictionless way to pick up where you left off. • You want to highlight, look up, and translate words while you read — without leaving the page. • You want to actually learn the words you encounter, not just look them up and forget them. • You don't want your reading history or your books uploaded to anyone's server. What you get: 📖 Multi-format reader — EPUB, PDF, and TXT, all rendered cleanly with light, dark, and sepia themes, adjustable fonts, line spacing, and PDF view modes (single page, continuous, two-page spread). ✍️ Highlights — select any text, pick from four colors, add notes. A sidebar lists every highlight across every book; click to jump back. Re-select a highlighted passage to remove it in one click. 📚 One-click define — select any word and see its definition, phonetic, and pronunciation audio inline. Powered by Wiktionary; falls back to high-quality Google text-to-speech. 🌐 Inline translation — translate any selected text into 10 languages without copying it elsewhere. 🔍 Web search — send a selection straight to Google in a new tab. 🧠 Vocabulary builder — every word you define is automatically saved with the sentence you saw it in. Review your collection with spaced-repetition flashcards (Leitner box: 1d → 3d → 7d → 14d → 30d → mastered). Quiz yourself with fill-in-the-blank using your own saved sentences. Export everything as CSV for Anki, Notion, or anywhere else. 🔒 Local-first by default — your books and progress live in your browser. No upload, no sign-in required, nothing leaves your device unless you opt in. Permissions explained: • storage — saves your books, highlights, vocabulary, and reading positions on this device. • alarms — periodically saves your reading position so a crash doesn't lose your spot. • api.dictionaryapi.dev — fetches word definitions when you tap Define. • translate.google.com — fetches pronunciation audio when no human recording is available. No analytics. No telemetry. No ads.