I built a 100% client-side image resizer for marketplace sellers (no upload, no server)

If you've ever listed anything on Etsy, you know the ritual: resize to 2000×2000, pad onto a white square, compress under 1MB, export as JPG — times 40 listings. Most people do this by hand in Photoshop or some sketchy online converter that uploads their product photos to who-knows-where. I got tired of both, so I built a small tool that runs...