You can pipe an existing diff through diff-so-fancy or diff-highlight: cat foo.diff | diff-so-fancy I've never tried, but that's what the doc says. [time

You can pipe an existing diff through diff-so-fancy or diff-highlight: cat foo.diff | diff-so-fancy I've never tried, but that's what the doc says. [time passes] Oh yes, it seems to work. It doesn't do colors when I try it, but that's probably a misconfiguration on my side. It's how this is intended to be used.