“Spider-Man: Turn Off the Dark” is generating a profit — for the feds.

The beleaguered $65 million Broadway show was slapped with $12,600 in fines for safety violations, the Occupational Safety and Health Administration said yesterday.

Investigating accidents from late last year, OSHA found “improperly adjusted or unsecured safety harnesses” and “unguarded open-side floors that lacked fall protection.” A spokesman for 8 Legged Productions did not return a call for comment.