How to Use a MOBI to PDF Converter for Kindle Books You can easily convert MOBI Kindle books into PDF files by using either free online conversion websites or dedicated desktop application software. MOBI was traditionally the standard file type used for Amazon Kindle e-readers. However, converting these files into PDF format allows you to easily view, share, and print your digital books on non-eReader devices like smartphones, tablets, and computers. Method 1: Use a Free Online Converter
Online web tools are ideal if you want to change your eBook files quickly without downloading or installing any new desktop software onto your device.
MOBI files: How to open, convert, and use them | Adobe Acrobat