The fastest way to send EPUBs, PDFs, and other compatible files is through the official Amazon Send to Kindle web page . How to Transfer Books & PDFs on Kindle in 2026
Transferring books to your Kindle—whether they are free classics from Project Gutenberg or personal documents—is a straightforward process once you know the right tools. You can send books wirelessly via a web browser, email, or mobile app, or use a traditional USB cable for direct transfers. Method 1: Send to Kindle via Web (Easiest Method)