Find your Kindle email address in your Amazon account
Add your personal email address to the approved send-to-Kindle list
Attach the PDF to a new email
Send the email to your Kindle email address
Use the subject line if needed, or leave it blank
Make sure the PDF file size is within Amazon’s sending limits
Open the document on your Kindle after it syncs
Use the Send to Kindle app or website as an alternative
Drag and drop the PDF into the Send to Kindle tool
Confirm delivery in your Amazon account if needed