Go have a look at https://beta.dwitter.net https://beta.dwitter.net - many of the examples there use this technique to fit more than 140 bytes into the "dweet"

Go have a look at https://beta.dwitter.net https://beta.dwitter.net - many of the examples there use this technique to fit more than 140 bytes into the "dweet" (many are also less than 140 characters, so don't need to use this compression technique). There is a convenient "compressed" switch to "decompress" the code. The rule on dwitter.net is no more than 140 characters (not 140 bytes).