Maximum WWW.text fetch size

Http doesn't specify a limit for Content-Length, however it depends on the software that processes the request. Unity uses an int to store the size, so the limit is at least 2GB (32-bit signed). In addition a string in C# is always stored as unicode (2 bytes / char) and therefore a string should be able to hold 1GB of data.

I guess you usually won't hit this limit since the download would take a while...