An unshorten URL tool is used to expand or resolve shortened URLs into their original long form. Here are some reasons why you might need an unshorten URL tool:

• Security: Shortened URLs are often used in phishing scams or to hide malicious links. Unshortening a URL can help you identify if the link is legitimate or if it leads to a malicious site.
• Accuracy: Shortened URLs can sometimes be confusing or difficult to understand, especially if they are not labeled with clear context or information. Unshortening a URL can help you better understand where the link is leading to, and can help you avoid clicking on links that you are not interested in.
• Research: If you are conducting research or investigating a topic, unshortening URLs can help you identify the original source of a link, which can be useful for citation or attribution purposes.
• Analytics: If you are a website owner or marketer, unshortening URLs can help you track clicks and traffic coming from shortened links. By unshortening URLs, you can get a better understanding of where your traffic is coming from and how users are interacting with your content.