Beef is an interpreter for the Brainfuck programming language.

Its main goals are to be comfortable for the user and to run most Brainfuck programs unchanged; speed is generally quite good.

Beef performs thorough error checking to make sure malformed programs are not executed; it also supports a bunch of command-line options that can be used for configuration or compatibility purposes.

If GVFS is installed, Beef can use any available backend as either output or (where it makes sense) input source. GNU readline is used for interactive input.