base65536, is the first implementation of this encoding.
Efficiency ratings are averaged over long inputs. Higher is better.
For example, using Base64, up to 105 bytes of binary data can fit in a Tweet. With Base65536, 280 bytes are possible.
Base65536 uses only "safe" Unicode code points - no unassigned code points, no whitespace, no control characters, etc.. For details of how these code points were selected and why they are thought to be safe, see the sibling project
... read the whole story at github.com.