AVG Linkscanner checks links on websites, in emails or chat messages in real-time and warns against potentially harmful content before the user comes into contact with it. On the results pages of search engines, the scanner marks secure links with a green checkmark and unsafe results with a red cross.

Conclusion
If one is unsure of link safety, AVG Linkscanner can help with assessing risks. An alternative is the tool WOT, which is based on the evaluations of Internet users.