Google's safe browsing technology provides a great tool called "Malware Checker" to check whether a website is currently dangerous to visit. Google checks billions of URLs per day looking for unsafe websites. Every day, they discover thousands of new unsafe sites, many of which are legitimate websites that have been compromised. When Google detect a unsafe website, they show a warning on Google Search and in web browsers. You can use Google's Malware Checker visiting here:
https://www.google.com/transparencyreport/safebrowsing/diagnostic/