Trim whitespace from the edges of every page.
Any PDF with a normal page structure.
Nothing is uploaded. The file is read on your device.
Cropping applies the same trim to every page.
Top, bottom, left and right independently, as a percentage of the page.
The visible area is reduced. Page content is not deleted, which matters. See below.
Trim top, bottom, left and right by different amounts.
A percentage works across mixed page sizes in the same document.
Cropping sets a crop box rather than deleting content, so the original area is still in the file.
One setting applies across the document.
Cropping sets the area a viewer displays rather than removing anything from the file.
The trimmed area remains in the document and can be restored by anyone who changes the crop box. If the margins contain something sensitive, cropping does not remove it.
A percentage behaves sensibly on a document that mixes page sizes, where a fixed measurement would trim unevenly.
Scanned pages often carry a dark border or the edge of the scanner bed. A small trim on each edge cleans that up across the whole document at once.
A crop that looks right on screen can clip content when printed. Print one page first if the document matters.
No. Cropping sets the visible area. The content is still present in the file, which matters if the margins contain anything sensitive. Crop is not redaction.
Not yet. The crop applies to every page.
So one setting behaves sensibly on a document that mixes page sizes.