Today I learnt how to batch rename file extensions 💻

I found myself needed to change all the extensions of files in a folder, in this case the files were using .markdown and I wanted to change them all to .md.

They are a number of ways to achieve this but the simplest I found was using the rename command line program.

This isn’t pre-installed on MacOS so I need to install it with brew install rename. I was then able to achieve what I wanted by running the following command:

rename 's/.markdown$/.md/' *.markdown