It’s very difficult to determine if a website will be dangerous just by looking at the URL, especially if it’s hidden under a URL shortener. You can, however, look for typos or changed letters if it’s a well-known domain. For example, if you see arnazon.com, it’s a dead giveaway that someone is trying to scam you with a fake Amazon website.
If you want to be sure, use a free URL checker like Link Checker or a paid service like NordVPN that offers this feature.