Requires gradle + OpenJDK 11
Run Build Task -> then the Burp Extension should be compiled to build/libs/SelectionSize-all.jar
The tool calculates the bytes of the current selection. This can be handy for specific exploits (e.g. request smuggling CL/TC chunk calculations).
Note: If you want to include non-printable characters in the calculation, click the "\n" button to enable viewing them.