Built-in or FOSS GUI application for generating a file hash

I would like to know if there's a built-in GUI application in Mac OS X that can generate file hashes (Disk Utility?). If there isn't such a built-in application, does a FOSS alternative exist? I can accept any application that can generate a file hash as CRC, MD5, or better in the SHA realm.

Additionally, showing how this is done in the application would be a bonus.

Solution 1:

Quickhash-GUI seems to be what you're looking for. It's cross platform meaning it will be the same "workflow" across macOS, Linux, and Windows.

QuickHash GUI is an open-source Linux, Windows, and Apple Mac OSX graphical interface that enables easy and rapid data hashing of data : text, text files line by line, binary files, file comparisons, folder comparisons, disks and drive volumes (as administrator), Base64 data, as well as allowing files in one folder to be copied to another with data hashing conducted at either side for comparisons and data integrity.

Solution 2:

If you want to find a method of converting general CLI scripts to the GUI, take a look at Platypus. Using this application, you can create GUI wrappers around CLI utilities. It's fairly straightforward to make a shasum or md5 wrapper that can allow drag and drop.

However, there are existing applications available to show file hashes (see Allan's answer).