What is The CropBox?
PDF pages define which region is displayed through boxes such as MediaBox and CropBox. Cropping shrinks the CropBox, changing what viewers show and print.
Crop PDF
Crop the margins of PDF pages
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Crop PDF
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How to crop a PDF
Open your PDF
Drop the PDF onto the page — it loads locally, nothing is uploaded.
Set the margins
Enter top, right, bottom and left crop values in points (0–2000).
Crop and download
Apply the crop and save the trimmed PDF — processed entirely on your device.
Frequently asked questions
Does cropping a PDF delete the hidden content?
No. Cropping adjusts the visible CropBox, so content outside the box is hidden from view and printing but still exists in the file. Cropping is not redaction — never use it to remove sensitive text.
What units does the crop tool use?
Points (pt), the native PDF unit. One point is 1/72 inch, so 72 pt equals one inch. Margins must be between 0 and 2000 pt.
Does it work with rotated pages?
Yes. The crop is applied in the visual orientation of each page, including pages rotated 90, 180 or 270 degrees and pages with a non-zero origin.
Will my file be uploaded to a server?
No. The PDF is parsed and re-written entirely in your browser with JavaScript — no upload, no account, no file ever leaves your device.
PDF cropping in points
Here is what each format is for, and when converting PDF pages trimmed to your margins is the right move.
What is Cropped output?
A PDF that visually trims margins, scanner borders or slide whitespace on every page while the underlying objects remain inside the file.
When you need it
Use it to trim scanner edges, oversized slide margins or blank borders before printing or sharing. Remember the hidden area is not deleted — for genuinely sensitive content, remove the pages instead.