Meaning of customizable in English. used to describe something that you can change according to a customer's or user's particular needs: ... Improve your vocabulary with English Vocabulary in Use from Cambridge.

Is it customizable or Customisable?

As verbs the difference between customise and customize

is that customise is (customize) while customize is to alter to suit individual requirements or specifications.

Is customizable correct?

"Customize" is the American spelling, and "customise" is the British spelling. There are many words in English that follow this pattern. The meaning of the word does not change.