LongURL is described as 'provides a standard API for expanding URLs which have been shortened with a service like TinyURL' and is a URL Shortener in the online services category. There are more than 10 alternatives to LongURL for a variety of platforms, including Online / Web-based, Google Chrome, Firefox, SaaS and Opera. The best alternative is Unshort.link, which is both free and Open Source. Other great apps like LongURL are FastForward, Unshorten.link, Where Does This Link Go and CheckShortURL.
Link Unshortner is a tool to show the user the final redirect of any URL. This is especially important if the link you are clicking on is not from a reliable source. Short links are often used for malicious activities to trick the user into trusting a site.