Url check:

https://f-droid.org/packages/com.trianguloy.urlchecker/

You set it as the default browser, so when you tap on a link you get the option to modify it before opening it. There are various plugins and you can have it automatically format a particular link if you deal with it often. You can also select it when sharing a link

I feel that we don't pay enough attention to link trackers. Even if you're logged out and using apps in the browser, link trackers in messages make it easy for services to map out networks of users. What's worse, you might dox yourself accidentally when posting a link, which when clicked on, greets the user with a banner saying "First-name Last-name is on Platform, see what else they're posting"

IMO privacy respecting apps like Signal and Firefox could be dealing with some common trackers by default, with an opt-in setting for other recommended ones (ex. Some people may like affiliate links, others will want to block them)