number base-to-base converter



0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@_ is the digit character set you have to work with, this is base 64.

This program does number conversion from one base to another base, either base from can be 2-64.

The algorithm is outlined here.

  • if there is an error because you used a character outside this character set, you will see the input box turn red when the focus leaves it and you will get 0 if you try it.
  • if you put in a character outside the range of the base, you will get 0.
  • if you try a number that is too big, this function will return something undetermined, maybe 0.


Base From: , Base To: