There is a major website called the Safe Cities Index, which specializes in analyzing and studying cities around the world. It conducted an analytical study of the safest cities globally, considering safety from all aspects such as health security, infrastructure safety, and more.

Here are the top 10 safest cities in the world. If you want to see the full ranking, you can visit their website at:
http://safecities.economist.com/safe-cities-index-2017

Ranking:

10th place
Madrid – Capital of Spain

9th place
Frankfurt – Germany

8th place
Stockholm – Capital of Sweden

7th place
Sydney – The largest city in Australia

6th place
Amsterdam – Capital of the Netherlands

5th place
Melbourne – The second-largest city in Australia after Sydney

4th place
Toronto – The largest city in Canada (not the capital)

3rd place
Osaka – A city in Japan

2nd place
Singapore – Known as the “city-state”

1st place
Tokyo – Capital of Japan

To see the complete ranking, visit:
http://safecities.economist.com/safe-cities-index-2017