De or het karaktercode?

The correct Dutch article is:

de karaktercode

Rule Words ending in -ode: always de. See the rule

How to use karaktercode

the karaktercodede karaktercode
this karaktercodedeze karaktercode
that karaktercodedie karaktercode
our karaktercodeonze karaktercode
your karaktercodejouw karaktercode
every karaktercodeelke karaktercode
which karaktercode?welke karaktercode?
a big karaktercode / the big karaktercodeeen grote karaktercode, de grote karaktercode