BrainFu** Interpreter and Debugger

Run Your Favorite Applications Online

Run Brainfu** and Ook Applications, Here and Now!


Please select the source code.
Input and output settings
Console or terminal emulation
EOF (on input)


  • First, select the source code. Then, run the selected program.
  • All textboxes can be enlarged by dragging the bottom right corner.
  • Learn to program in Brainfu** with a short tutorial.
  • The %%dbg command breaks into the debugger (when it is enabled). Also: %%dbg{integer}, but without braces.
  • Supports and auto-detects at least thirty Brainfudge equivalents.
  • To run Ook! and Brainfu** applications offline, use the OokBF Offline cross-platform package.