No, OutdoorBrite isn't free. There's no free plan or free trial, so you pay before you see your first design.
We charge from the start because every design takes real computing power, and we'd rather put our best into your first result than limit it to a free sample. Plans start at $29 a month, or $23 a month if you pay yearly, and you can cancel anytime from your settings.
If you want to try something for free first, a few other tools have free tiers. Our OutdoorBrite alternatives guide compares them. When you're ready to compare our plans, the pricing page shows what each one includes.