Brainfuck step visualizer

BrainCrawly

Step through code one instruction at a time, watch the tape shift like a slot machine, and inspect output as the program runs.

Visualization

Live execution

Code trace

highlighting instruction 0
++++++++[>++++++++<-]>+.

Tape

showing 10 cells centered on the pointer
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0
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9

Step log

latest instruction first
No steps yet.

Output

bytes emitted by . instructions
Output will appear here after execution.