URL shorteners are web tools that condense lengthy URLs into shorter, more manageable links. They simplify sharing and improve readability, especially in character-limited platforms like social media. These services redirect users from the short link to the original, long URL. Popular URL shorteners like One Tool Box, Bitly, TinyURL, and goo.gl offer analytics, allowing users to track clicks and engagement. While primarily used for convenience and aesthetics, URL shorteners also provide security features like link expiration and password protection.