Crop PDF Pages Online — Remove Margins and Scanner Borders Free
Remove thick white borders from scanned PDFs, crop book scan margins, or trim slide whitespace. Set precise margins in mm with a live preview. Browser-based.
Scanned PDFs often have thick white borders from scanner beds. Textbooks scanned from physical books have curved margins that waste screen space. PowerPoint slides exported to PDF sometimes have large white borders around the content. Cropping fixes all of these.
Crop PDF Pages in Your Browser
Our PDF Cropper lets you set precise margins in millimeters for top, right, bottom, and left edges. A live red overlay shows exactly what will be cropped before you apply.
- Open the PDF Crop tool.
- Upload your PDF file.
- Choose scope: all pages, a page range, or individual pages.
- Enter crop margins in mm — preview updates live with a red crop overlay.
- Click "Apply Crop & Download."
Common Crop Scenarios
- Remove scanner borders: Apply 5–10 mm on all sides to remove the grey border typical of flatbed scans
- Crop a book scan: Apply more margin on one side (the binding side) than the other
- Remove slide white space: Apply 20–30 mm top and bottom to zoom into PowerPoint slide content
- Different per page: Use "Per page" mode to apply different crops to individual pages
Does Cropping Reduce File Size?
Cropping in PDF works by changing the crop box (a metadata property) — the content outside the crop area is hidden but not deleted from the file. File size decreases minimally. If file size reduction is your goal, use the PDF Compressor instead.
Crop vs Trim: Terminology
In professional printing, "crop" and "trim" have slightly different meanings (bleed marks, etc.). In everyday PDF editing, cropping means reducing the visible area of the page — which is what this tool does. The result is a PDF that shows only the portion you specified on each page.