How to Crop PDF Margins

A scanned page with wide, uneven margins, or a PDF exported with too much surrounding whitespace, both benefit from the same fix: cropping. It's a purely visual trim — the content itself doesn't move, only the page boundary does.

When cropping helps

• Scanned documents that include large amounts of surrounding scanner-bed background.
• PDFs exported with excessive whitespace, such as slides or reports with oversized margins.
• Preparing pages for a specific print size, where standard margins don't fit the intended layout.
• Removing headers or footers that fall consistently within a specific margin band across every page.

Step-by-step: cropping a PDF

1. Open Crop PDF and upload your document.
2. Enter how much to trim from each edge, in points (72 points = 1 inch):
   • Left
   • Right
   • Top
   • Bottom
3. Download your cropped PDF.

Estimating the right values

Points can be a bit abstract if you're not used to layout units — a good starting point is to try a modest value (like 20-30 points) on one edge, check the result, and adjust from there. Since all four edges are independent, you don't need to guess the same amount for every side — a scan with a wide left margin and a narrow right margin can be trimmed accordingly.

What cropping doesn't do

Cropping changes the visible page boundary, not the underlying content — if there's text or an image within the area you crop, it will be cut off, not reflowed. Always sanity-check your intended margin values against how much actual content sits near the edges of your pages.

After cropping

Once your margins look right, you might also:

• Add page numbers, since the usable page area has changed.
• Compress the result if the original had a lot of scanned image data now trimmed down.

Cropping is a small, precise fix for pages that just have too much (or unevenly distributed) empty space around the actual content.