Guides
Short, practical guides on reading and annotating PDFs and EPUBs in your browser — free, offline, and on any device. Plus honest comparisons with the readers you might be leaving behind.
How-to guides
How to read EPUB files in your browser
Open an .epub in a tab and read it free, offline, with themes, fonts, highlights, and notes — no app to install.
Read the guide →How to highlight and annotate PDFs online — free
Mark up a PDF without uploading it anywhere: four highlight colors, notes, and a per-book journal, all saved on your device.
Read the guide →How to read ebooks offline in your browser
Load your books while you’re online, then read them on a plane or subway with the connection off. Here’s how it works.
Read the guide →How it compares
A lightweight Calibre alternative
Love Calibre for managing your library but want something simpler to actually read and annotate in? Here’s the lighter option.
Read the guide →An Apple Books alternative for every device
Stuck inside Apple’s ecosystem? Read the same PDFs and EPUBs on Windows, Android, and Chromebooks too.
Read the guide →A Kindle alternative for your own PDFs
Kindle mangles your own PDFs and won’t sync your highlights on them. Read the files you own, with notes that follow you.
Read the guide →