Salamu Alaykum!
I have a website that allows users to shorten their links (like bitly.com). They can shorten the URL of any website, which could be, for instance, a phishing attack page (page to steal users’ credentials) or a pornographic website for that matter. For clarification, the short links generated in my website redirect to users’ original links, I don’t host the content. Plus I don’t showcase any links on my website, it’s up to them to share the short link…
At most I can ban all porn links and most malicious links (with the help of blacklists), but if they want to redirect to some haram content (music) I wouldn’t know
Could the entirety of this service be haram because of those minority of malicious user-generated links? Or is it like, for example, selling a writing software (like Word) and then people can use it to write haram stuff (if that’s halal to begin with 
)
P.S. it’s a renowned service, and widely used for many purposes like marketing to track campaigns…
Baraka Allah fikum brothers!