1. Peakpx
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2. 3 books
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3. online crop

"3 books" image original width is 2434px, original height is 1795px, you can crop it to any sizes with width less than 2434px and height less than 1795px. drag area with blue border below to select which to crop, double click dark area to toggle "drag" and "crop" mode, use your middle mouse button to zoom in or zoom out, then click blue button to download cropped image.