I use Kent C. Dodd's netlify-shortener tool to setup a free URL shortener on Netlify.
It works by updating a
_redirects file in your repository with a CLI command, so I can type
shorten https://sunnysingh.io/blog/readable-code my-short-name and it will deploy and copy
https://sunny.link/my-short-name to my clipboard.
It's also possible to create a web interface for this as well, but will take a bit more time to setup versus the few minutes with netlify-shortener.
Feel free to look at my URL shortener repo to see how few things are needed to get it working: https://github.com/sunnysingh/sunny.link