You can add PDFs to a Kindle by using the "Send to Kindle" email address, using a USB cable, or using the "Send to Kindle" tool on Amazon's website. Kindle will automatically convert the PDF to a Kindle file format so you can highlight and take notes. (For complex layouts, the conversion may still not allow font size adjustment, and you'll need to try convert PDF to Kindle format manually.) Using the "Send to Kindle" email address  1. Find your "Send-to-Kindle" email address in your Amazon "My Devices" page 2. Attach the PDF as an email attachment to the "Send-to-Kindle" email address 3. Unlock your Kindle and connect it to Wi-Fi 4. Look in your Library for the PDF Using a USB cable 1. Connect your Kindle to your computer with a USB cable  2. Find the PDF you want to add to your Kindle  3. Open the Kindle icon/folder and navigate to the "documents" folder  4. Drag and drop the PDF file into the Kindle "documents" folder  Using the "Send to Kindle" tool on Amazon's website  1. Go to [amazon.com/sendtokindle](https://www.amazon.com/sendtokindle) 2. Sign in to your Amazon account 3. Click Select files from device 4. Select the PDF you want to add to your Kindle