Readest — Free Open-Source EPUB & PDF Reader for All Platforms

You Read, Digest and Get Insight.<br>Readest is a free, open-source EPUB and PDF reader designed for deep, immersive reading. Enjoy highlights, notes, split-screen reading, text-to-speech, and cloud sync across macOS, Windows, Linux, Android, iOS, and the Web.

Parallel Read,<br>Side by Side.<br>Compare texts, translations, or ideas with Parallel Read , our split-screen book reader. Read two ebooks or documents side by side — perfect for researchers, students, language learners, and anyone who reads more than one book at a time.

Read books<br>in style.<br>Personalize your reading experience with customizable themes, fonts, and colors. Whether you prefer light mode, dark mode, or a sepia tone, Readest adapts to your eyes and environment for comfortable, distraction-free reading.

Break barriers with<br>effortless understanding.<br>Instantly translate paragraphs with DeepL integration or look up terms on Wikipedia — right inside your book. Readest's built-in translation and lookup tools make it the ideal ebook reader for multilingual readers and curious minds.

Refine Your Reading Experience<br>Explore a powerful EPUB and PDF reader packed with features for curious, passionate readers — from annotations to text-to-speech and cross-device sync.

Shuffle IconParallel Read<br>Read two books side by side in split-screen view with synchronized scrolling and navigation.

Signal IconReading Essentials<br>Highlight passages, bookmark pages, take notes, and search across your entire ebook library.

Magic IconCustomization<br>Adjust fonts, margins, line spacing, and theme colors for a comfortable, personalized reading experience.

Door IconSmart Tools<br>Look up words, translate text with DeepL, and browse Wikipedia — all without leaving your book.

Cards IconCross-Platform Sync<br>Pick up where you left off on any device. Your highlights, notes, and reading progress sync automatically.

Talking IconRead Aloud<br>Listen to any ebook with AI-powered text-to-speech (TTS). Turn your reading into an audiobook experience.

Stay Ahead with Readest<br>Get early access to new features, platform releases, and reading tips. Subscribe to help shape the future of the best open-source ebook reader.<br>Your Email<br>SubscribeBe the first to experience Readest.