Comparing Two Text Files

[unmerged(96046)]

Let's say I have two different monarch lists, two different leader lists, or whatever, for the same country. I want a utility that would automatically compare the two files and tell me the exact differences between them. Is anyone aware of such a utility?

Thank you.

 

[cool-toxic]

ConTEXT?

 

[MichaelM]

Wikipedia for diff (shorthand for "difference") links to an online diff program.

 

[unmerged(96046)]

The on-line diff thing works very well, thanks.