Sniffer may refer to:
Packet analyzer (aka network analyzer, protocol analyzer or sniffer), computer software or hardware that can intercept and log traffic passing over a digital network The trademark for the original Network General Sniffer protocol analyzer Autolycus (submarine detector) (aka sniffer), a device to detect diesel exhaust fumes from a submarine Allan Clarke (footballer), the Leeds Utd, Fulham and England striker known by that nickname A slang term for intoxicative inhalants Sniffer (Anwar Ka Ajab Kissa), a 2013 Indian film directed by Buddhadev Dasgupta