How do you find the hash of a URL?

How do you typically find the hash of a URL? I understand that hashing is the process of converting a string of text into a fixed-length hash value, but what specific steps would you take to generate the hash of a given URL? Are there any tools or software programs that you recommend using for this purpose? Additionally, are there any considerations that one should keep in mind when hashing a URL, such as the choice of hashing algorithm or potential security implications?