Generate previews of PDF files (Craft 3) Is it possible to auto-generate PDF preview images with Craft 3 transforms?

Or are there any Craft 3 plugins that do this? I see a few Craft 2 versions.
I created a plugin specifically to do this - 
https://github.com/bymayo/craft-pdf-transform

It takes Asset PDF files and coverts them to JPEG / PNG files automatically when they are uploaded.

Or, do theres a Twig method that lets you convert the PDF to an image if the image already exists in Assets. But this can be a bit labour intensive on the server to do when a template is rendering so is only advised for small files.