Higher wattage chargers are fine for MacBook Air.

Yes, it’s safe. The MacBook Air only draws the power it needs, so a 96W charger won’t force extra current into it.

Your MacBook Air has built-in power management that negotiates the voltage with the charger. Plug a 96W brick into a MacBook Air and it’ll pull whatever it’s designed to — typically 30W or 35W for most Airs, maybe 67W for the newer M2/M3 models. The charger just sits there ready to provide more, but the laptop never asks for it.

The only real difference is that you could charge a Pro or a bigger device with that same charger. And if you already own a higher wattage charger from another device, use it. No harm. No fire risk. The battery doesn’t care.

If you’re buying a new charger for just the Air, save money and get the recommended wattage (30W or 35W usually). But if you already have a 96W, don’t overthink it.