This is a hexdump-style stream processing tool to convert from readable, UTF8-encoded text into URL-encoded output.
sudo npm -g install git+https://gist.github.com/bc62904c1956837a01d49d11767f8102.git
$ echo '<script>alert(1)</script>' | urldump
%3c%73%63%72%69%70%74%3e%61%6c%65%72%74%28%31%29%3c%2f%73%63%72%69%70%74%3e%a