A URL shortener is a service that is used to create short links from very long URLs. Usually, short links have the size of one-third or even one-fourth of the original URL, which makes them easier to type, present, or tweet. Clicking on a short link user will be automatically redirected to the original URL.
There are many URL shortening services available online, such as tiny.cc, bitly.com, and cutt.ly. Implementing a URL shortening service is not a complex task, and it is often part of system design interviews. In this post, I will try to explain the process of implementing the service.