macOS command-line tools you might not know about

I find that the `pbpaste | something | pbcopy` idiom is common enough that it's worth having a shell function for it:

  pbfilter() {
      if [ $# -gt 0 ]; then
          pbpaste | "$@" | pbcopy
      else
          pbpaste | pbcopy
      fi
  }       

Then you can use something like `pbfilter json_pp` or `pbfilter base64 -d` or `pbfilter sed 's/this/that/'` or whatever.

This version also can also act as a plain-text-only filter. If you just use `pbfilter` with no argument, it'll remove any formatting from the text in the pasteboard, leaving just straight plain text.

It does have a some limitations, though: you can't use it with an alias, or pipeline, or anything complex like that. The filter command must be a single regular command (or function) and its arguments.