Checking for this, i see that the only one was the old unshort.link, but the repo was discontinued
I developed this script for creating permanent/static archives of social media exports, so it’s not a full solution - not a web service, expects file inputs, uses a probably incomplete list of shorteners to avoid pulling real pages - but it along with the shorteners.txt file in the same repository, iterating to find a domain not on the list, might at least inspire a solution, if it’s not good for your specific cases.
v3ritas@infosec.pub 6 months ago
I’m sure there are better alternatives (going to look at some of the other suggestions here), but I usually just drop the link into www.expandurl.net