Crop PDF
Trim margins and whitespace from your PDF pages.
How it works
Upload PDF
Select the PDF file to crop.
Set Margins
Specify how much to trim from each side.
Download
Download your cropped PDF.
About This Tool
PDF cropping removes unwanted whitespace and oversized margins from document pages, making them easier to read on screen or to prepare for specific printing requirements. Scanned documents often have large black borders or uneven margins introduced by the scanning hardware; cropping eliminates these and produces a clean, focused page. Academic papers, ebooks, and reports downloaded from publisher sites frequently carry wide margins that make reading on tablets unnecessarily small — cropping fixes this immediately.
JustConvert's crop tool lets you specify exact margin sizes in points for each side independently (top, bottom, left, right). The changes are applied to every page of the document, and the resulting PDF is immediately available for download. No page content is lost — the crop simply adjusts the visible area of the page.
- check_circleIndependent control over all four margins
- check_circleSpecified in standard PDF points
- check_circleApplied to every page simultaneously
- check_circleRemoves scanner borders and excess whitespace
- check_circleBetter reading experience on tablets and e-readers
- check_circleFiles deleted automatically after download
Cropping a PDF hides content, it does not delete it
This is the single most important thing to know about PDF cropping, and it surprises people. Cropping a PDF adjusts the CropBox, a rectangle that tells a viewer which part of the page to display. The content outside that rectangle is still present in the file — it is simply not drawn.
That means cropping is reversible, which is convenient, and it means cropping is not a redaction method, which matters far more. Text hidden by a crop can be recovered by resetting the CropBox, and it is still found by copy-paste, by text extraction, and by search indexing. Never crop a PDF to conceal confidential information — account numbers, names, addresses, signatures. Redaction requires a tool that removes the underlying content, not one that changes what is displayed.
What cropping is genuinely useful for
The main use is reclaiming screen space. Academic papers and older documents are frequently laid out with very generous margins that waste a third of the page, which is barely noticeable in print and painful on a tablet or e-reader. Cropping the margins makes the text substantially larger for the same screen, and it is the reason most people reach for this tool.
Two others come up often. Scans frequently include a black border, a strip of the scanner lid, or part of the facing page, and cropping tidies the edges. And documents scanned two-up, with two book pages on one sheet, can be cropped to isolate a single page column. Note that cropping does not usually reduce file size, since the hidden content is still stored — if size is the goal, use Compress PDF.
Getting a consistent crop across pages
A crop that suits one page rarely suits all of them. Check the document before applying a single rectangle to every page: a report with a full-bleed cover, landscape charts among portrait text, or a title page laid out differently will lose content if cropped uniformly to the body-text margins.
Scanned documents need particular care, because pages fed through a scanner are never perfectly aligned. A crop tight enough to remove the border on a well-aligned page will clip text on a page that went through slightly skewed. Leave a few millimetres of tolerance rather than cropping to the exact edge of the text. And always keep the original file: because a crop can be reset, working from a copy costs nothing and means an over-tight crop is not a problem you have to solve later.
Cropping against the alternatives
| Goal | Use | Note |
|---|---|---|
| Reduce wasted margins for reading | Crop PDF | Content is hidden, not removed |
| Permanently remove sensitive text | Not cropping | Cropping is not redaction |
| Make the file smaller | Compress PDF | Cropping rarely reduces size |
| Remove whole pages | Remove Pages | Deletes pages outright |
Frequently Asked Questions
What units are the crop margins specified in? expand_more
Margins are specified in PDF points, where 72 points equals one inch (approximately 28.35 points per centimetre). A value of 72 for the top margin would remove one inch from the top of every page.
Does cropping remove actual page content? expand_more
Cropping adjusts the PDF media box, which defines the visible area of the page. Content that falls outside the new boundaries is hidden but not deleted. In some PDF editors you can restore the original boundaries; however, JustConvert trims the actual content box for a clean, final output.
Can I crop individual pages differently? expand_more
The current tool applies the same crop margins to all pages. If you need different crops for different pages, split the document first, crop each section individually, and then merge them back.
Why would I need to crop a PDF? expand_more
Common reasons include: removing thick black borders from scans, reducing oversized margins on academic papers for better tablet reading, standardising page sizes when combining documents from different sources, and preparing print-ready PDFs that fit specific paper dimensions.
Will the file size change after cropping? expand_more
Cropping adjusts the viewable area of the page but does not re-encode image data. File size typically stays the same or decreases only slightly.