Polr is an open source, minimalistic URL shortener. Over the course of the years, I have noticed that most popular URL shorteners produce increasingly long URLs, rather than the short ones they are supposed to create. To address this issue, I created Polr. Polr uses base36 and base62 algorithms in order to create the shortest URLs possible. It is fast and minimalistic, and open source as well, so that the community can benefit from my project, and learn from it.