What do you say to get the attention of a passerby in french?

To get the attention of a passerby in French, you can say, "Excusez-moi!" (Excuse me!) or "Pardon!" These phrases are polite and commonly used to catch someone's attention. If you need to ask something specific, you might follow up with, "Pourriez-vous m'aider, s'il vous plaît?" (Could you help me, please?).