There is a tightrope between sarcasm and playing it off rude. Sometimes, when a person is using sarcasm, he or she might come off rude and that is the hardest part, keeping your sarcasm as light as possible to the point that it isn’t even noticeable at all.
Now, when the time comes that you have to use it, be careful with your selection of words as to make sure that you do not offend anyone, at least if you intend not to. However, there are times when you want to make a sarcastic remark in order to make someone realize their mistake.
For times when you cannot do so in person and you need to use some text or chat, you can use the following sarcastic memes to do the talking for you. After all, some things cannot be translated into text, but these memes should come close enough to that.