Show HN: Shotframe – Free mockup generator with saveable style presets

Hey HN,

I built Shotframe to solve a problem I kept running into: creating consistent mockups for product screenshots without repeating the same setup every time.

What it does: - Upload a screenshot, add device frames and backgrounds - Save your style as a preset, reuse it instantly - Free to use, runs in browser, no account required (optional account to save presets to specific period of time as testing purpose.)

I built this because tools like shots.so charge for templates. I wanted something where I could create my own presets and reuse them for free.

Tech: NextJS, CanvasAPI, Supabase.

Would love honest feedback. What's missing? What would make this useful for your workflow?