It depends on us that we want to use it online or not.
But if you are ready to use some other tricks, then the answer is yes. Apple has not released the desktop version or web version of the iMessage yet. You can’t use this app online via the official version. The simple answer to this question is obviously no. Many of the users want to know that is it possible to use iMessage application online. IMessage online is one of the highest used apps by apple users.
