Pixels and crop are different.
Resize changes pixel dimensions. Crop changes which part of the image survives. Changing aspect ratio often means doing one, the other, or adding empty space.
Smart / Local Tools
Auto-crop around the main object.
Detect the strongest recognisable object in an image, add breathing room, and export a tighter crop automatically.
Private by design: your image stays in this browser tab. The object detector downloads on first use and runs locally.
Useful to know
Four things worth knowing.
It cannot invent the frame.
A new shape cannot reveal content outside the original frame, and enlarging dimensions does not create genuine captured detail.
Check the edges.
Automatic results still need a human check around edges, text, faces and small details.
Size for the destination.
Pick the final destination first. A profile photo, print, story and website hero all want different shapes for a reason.