Remove margins or trim content from your PDF pages
Cropping trims the visible area by setting the PDF CropBox. The original content is preserved and can be un-cropped later.
Drop your PDF here
PDF files only • Max 100 MB • Runs in browser
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Crop Margins
Units:
Leave blank for all pages
Done!
Live Preview
See the crop before applying
mm / px / pt
Specify margins in your preferred unit
Page Selection
Crop all pages or a custom range
Privacy First
Processed entirely in your browser
Trim the visible margins of a PDF's pages — removing excess white space or unwanted edges — without altering the underlying page content, processed entirely in your browser.
How It Works
How Crop PDF Works
This tool runs entirely in your browser: your PDF is never uploaded to a server. PDF.js renders each page so you can see exactly what you're working with, and you define the crop by entering margin values (in points, inches, or millimeters) for each side of the page, or by adjusting a visual crop overlay.
On export, PDF-lib sets each page's CropBox — a standard PDF property that defines the visible viewing/printing area — to your specified boundaries. Crucially, the underlying page content itself is not deleted or redrawn.
Because cropping only adjusts the CropBox rather than deleting content, the crop is non-destructive: opening the cropped file in another tool and clearing or expanding the CropBox would reveal the original full page again.
Worked Example
See It In Action
A PDF exported from a design tool with 15mm of blank margin on every side can be tightened by entering a 15mm crop on all four sides, producing a file that displays and prints with the whitespace trimmed away, while the original full page content remains intact underneath.
FAQ
Frequently Asked Questions
Is my file uploaded to a server?
No — cropping runs entirely in your browser using PDF.js for rendering and PDF-lib for editing the page boundaries. Your file never leaves your device.
Does cropping delete the trimmed content permanently?
No — cropping adjusts the PDF's CropBox, which defines the visible area, rather than deleting the underlying page content. The full original page technically still exists in the file, just outside the new visible boundary.
Can I crop different amounts on each side?
Yes — top, bottom, left, and right margins are set independently, so you can trim more from one edge than another.
Can I crop only some pages instead of the whole document?
Yes — a page-range option lets you apply the crop to specific pages instead of the entire PDF.
