Polr is a fast, open-source, and modern link shortener. It allows you to create your own URL shortener and brand your URLs. You also have control over your data. It is also GPLv2+-licensed. You can follow the installation instructions and be up and running in no time. A modern and easy interface to manage your links, and control your instance. To customize your branding, run on your domain. You can either use Polr straight out of the box, or fork the code to modify it to your specifications. You can customize your instance's redirects, shortening permissions, and even its theme.