FrameFit
Set the width and height, keep the proportions, or fill a square, 1920×1080, or 1080×1920 frame.
Keep the whole photo scales it until both sides fit the width and height, so one side can end up shorter than the frame. Fill the frame crops the middle until the photo covers the frame. Stretch uses both numbers exactly and can change the shape. The lock keeps the photo's own proportions while you edit one side. Sides are capped at 8,000 pixels. JPEG and PNG are drawn here, so the download does not keep the original location data.