Building in the open
Notes on banner design, animation, performance ad creative, and how we’re building BannerKit AI. Written by the founder; no AI-generated filler.
How we extract brand colors from any URL with Gemini Nano Banana
Type a URL into BannerKit AI and seconds later you have a banner with the right headline, the right colors, and a background image that actually fits the brand. No design files. No brand guide upload. No color picker. Here's how the pipe works under the hood — and why we ended up using Google's Gemini models instead of the more obvious choices. The problem "Make a banner that matches my brand" is a deceptively hard ask. You need to know: * What the brand actually looks like. Logo, colors,
Why we host every banner forever, free
Most banner tools delete your URLs after 30 days. We don't. Here's why permanent hosting is part of the product, what it costs us, and what it changes for you.