In practice, memory is measured in KiloBytes (KB) or MegaBytes (MB). We can reshape and convert it into another array with shape (b1, b2, b3, , bM). Here, we will go through the different ways to convert file to byte array in Java. If I'm a hacker, it's not like I'm gonna use firefox to access the web service I'm hacking. Step 1: Open notepad. Later we call toByteArray() that returns the output stream in the form of a byte array. The gist of it is: In the limited case when youre using JavaScript to put content from another origin into a