TinyURL is a free service that converts long URLs into short, unique URLs. The shortened URLs is a random combination of letters and numbers that have no relationship to the original website URL entered.
Use of TinyURL prevents URLs from breaking in an email. Its use also makes it possible to hide affiliate links and to use fewer characters on social media sites such as Twitter. Custom TinyURL have a custom alias option to create brand recognition for websites. As of 2015, most TinyURLs are a total of 11 characters.
Bit.ly is also a URL shortening service. Its shortened URLs are six characters as of 2015.