BookShift – E-Book Converter

Convert EPUB, FB2, MOBI and TXT e-books instantly. Click the icon to open. Drag & drop. 100% offline. No uploads.

📚 BookShift turns every new tab into a powerful e-book format converter. Drop a file, pick a target format, click Convert — done in seconds. ✨ FEATURES • Drag & drop or click to browse • Supports EPUB, FB2, MOBI / AZW, and TXT • Convert between: EPUB ↔ FB2, EPUB → TXT, FB2 → TXT, TXT → EPUB / FB2, MOBI → EPUB / FB2 / TXT • Preserves chapter structure, titles, author info, and cover images • Conversion history — see your last 10 conversions at a glance • Dark & Light themes • Compact new-tab design — your links and shortcuts are just one click away 🔒 PRIVACY BookShift works 100% offline, inside your browser. Your books never leave your device. No analytics. No tracking. No accounts. ⚡ PERFORMANCE All conversions happen client-side in JavaScript — no server round trips. Typical EPUB ↔ FB2 conversion takes under 2 seconds even for large books. 📖 SUPPORTED FORMATS Input: EPUB (.epub), FictionBook (.fb2), MOBI / AZW (.mobi, .azw, .prc), Plain Text (.txt) Output: EPUB 3.0, FictionBook 2.0 (.fb2), Plain Text (.txt) 💡 TIPS • Metadata (title, author, language) is preserved automatically • Cover images are carried over when converting EPUB ↔ FB2 • TXT conversions detect chapter headings automatically