Better privacy for ground-floor windows

The ground-floor windows feel too open, especially during the day when people walk past. I don’t want heavy curtains but still need the view blocked from outside. Has anyone used privacy window film for this? How effective is it at stopping people from looking in while still letting natural light through?

Ground-floor windows can feel very exposed when people walk past during the day. I wanted better privacy without relying on heavy curtains. After trying https://www.tintfit.com/shop/privacy-products the view from outside is significantly reduced while natural light still comes through. The rooms stay bright and the film looks clean. It’s been a practical way to improve privacy without major changes.