There are several online services that can do what you want.
Besides those ones previously mentioned, you can also use check for malware incidents at
AVG Threat Labs.
But it turns out that even reputable sites (like Facebook, Google, Blogger etc) may occasionally host malware or have other issues. So if you want to have an overview of the reputation of a website, you can check it out using
Web of Trust
This one collects data from Internet users which decide on websites reputation. They have extensions for browsers such as Chrome and Firefox.