Oversized white margins from scanners, printing presets, or software defaults waste screen space and paper. This guide shows you how to trim PDF margins precisely in millimeters using a live visual preview — no quality loss, completely free.
Common reasons to crop PDF pages:
Visit gsdocseva.com/crop-pdf.html. No account needed.
Click "Choose PDF File" or drag your PDF in. The first page renders as a live preview showing the current full page boundaries.
Enter values in millimeters for Top, Bottom, Left, and Right — or click a Quick Preset. The blue crop rectangle updates on the preview instantly as you type.
The info bar shows Page Size (original) and After Crop (resulting). Make sure the crop size is reasonable and not cutting into actual content.
Click "Apply Crop & Download PDF". The CropBox is set on all pages and the file downloads with -cropped.pdf in the filename.
📖 E-Reader Tip: For academic PDFs on Kindle or tablet, crop 15–20mm from all sides. This removes the publisher margin and makes the text display larger on the screen without any content loss.
Yes — technically. PDF cropping sets the CropBox which defines the visible area. The original content outside the CropBox is hidden but remains in the file structure. To restore the original view, open the file in Adobe Acrobat and reset the CropBox to match the MediaBox. However, for most practical uses, treat the crop as permanent and keep the original file as a backup.
Live preview, mm precision, quick presets — non-destructive CropBox operation.
Open Crop PDF Tool →