Trim white margins or cut a PDF down to the area you need. Drag a box on the page and crop one page or all of them. Free and private.
Processed on your device. Never uploaded.
Upload your PDF.
Drag the box to the area you want to keep.
Apply to all pages or just this page.
Crop and download.
Cropping hides everything outside the box, the same way desktop PDF editors do. The visible content keeps its original quality.