How this tool works

Crop PDF: a practical guide

Moves each page crop box inward by the margin you choose. The tool checks that the remaining width and height stay positive.

Steps to use this tool

Select a PDF.
Enter the margin for each side.
Crop and inspect visible bounds without treating them as secure removal.

Tested example — 19 October 2026

A 10-point margin changes the sample's 595-point page width to 575 points.

Selected sample: sample.pdf (2421 bytes, 2 pages).

Measured output: sample-cropped.pdf — 2481 bytes; 2 PDF pages.

Sample settings:

{
  "margin": 10
}

A 10-point margin changes the sample's 595-point page width to 575 points. — Page 1 rendered from the actual automated sample PDF output; this is not a browser screenshot.

Test environment: Node + native canvas + actual site-ui.js form integration in LinkeDOM Representative sample; inspect your own output.

Check the result

Compare the visible page dimensions and all four margins. Keep a copy of the uncropped source so you can recover content hidden by the new boundary.

Files and privacy

The public tool processes selected documents in your browser. It does not send document bytes to a conversion server. The page and its bundled libraries still download from this website. Keep the original, use an up-to-date browser and inspect your output before sharing it. See the privacy policy for hosting and support information.

If processing fails

A margin that would remove the whole page is rejected. Use Redact PDF for privacy-sensitive content because a crop box alone is not deletion.

Implementation notes and sample evidence updated 2026-10-19. These notes describe the supported operation and its limits.

Check the local-processing claim in your browser’s Network panel.

Crop PDF