How to create thumbnail image from a text file?

Question

I have text files in txt and md format. How can I create thumbnail images from these files? This conversion should work similar as in Google Docs or Google Drive. See screenshot attached.

Answer 1

You need this for some small number of files and it can be done beforehand or dynamically?

If it is a small number and can be done before, use https://convertio.co/txt-svg/ tool and then save svg images for later use.