Awesome

Whitespace-JS

Whitespace interpreter written in JavaScript

npm install -g @susisu/whitespace-js
wspace <progfile>

It also contains ws2unws and unws2ws which convert a Whitespace program into a human readable format (named UnWhitespace) and vice versa.

For more information, see wspace -h.

Numbers and arithmetic have only 32bit precision (not arbitrary precision as the original implementation).
Programs not terminated by [LF][LF][LF] will produce warnings (use -w, --no-warnings to suppress them).