Show HN: Give your screenshots a sick background

I got tired of spending time in design tools just to make screenshots look presentable for social media. So I built this simple and minimalistic web app where you can drag and drop a screenshot, pick a gradient background, adjust padding and shadows, and download the result.

It's completely free, works in the browser, and doesn't require any sign-up. The images are processed client-side, so nothing gets uploaded to a server.

Would love to hear feedback on features you'd find useful!