How about this in OSX? echo "data:$(file -b --mime-type filename);base64,$(base64 filename)" | pbcopy or for linux, your favorite variant of pbcopy using xsel

How about this in OSX? echo "data:$(file -b --mime-type filename);base64,$(base64 filename)" | pbcopy or for linux, your favorite variant of pbcopy using xsel or xcopy? Not to say this isn't a great tool.