Can you please tell me why the tips of the leaves are getting brown on my spathiplyllum? In advance thank you

There are a small few indoor plants that are susceptible to brown tips like dracaena's, palms, spiders, prayer plants to name a few.
Brown tips can be caused by a few reasons, too much water, not enough water, poor drainage, too much fertilizer, use of hard-water, low humidity, or a combination of the above.

Keeping the pot small can help with less brown tips. You can also try watering with rain or distilled if you think it's from hard-water.