Crop PDF Page Margins
Trim margins and crop PDF pages. Fast, secure, and works right in your browser.
How to crop a PDF — 3 steps
- 1
Add your PDF
Drop the document in and it opens in the browser, ready to work on without being uploaded anywhere.
- 2
Set the new page boundary
Drag the handles to frame the area you want to keep, or trim specific margins to strip whitespace from a scan. Apply it to one page, a range, or the whole document.
- 3
Download the cropped PDF
The pages are exported at their new size with the content position preserved. Your original file is unchanged.
Cropping hides content rather than deleting it
A PDF page carries several boundary definitions at once. The MediaBox describes the full physical page as it was created. The CropBox describes the region a viewer should actually display. Cropping a PDF, in almost every tool including this one, changes the CropBox — it tells readers to show a smaller window onto the same page. The material outside that window is still present in the file.
In practice that is fine, and it has a genuine advantage: cropping is reversible. Widen the crop later and the content that was outside it reappears intact, which is exactly what you want when you have trimmed a scan too aggressively. Nothing has been destroyed, so nothing needs re-scanning.
It becomes a problem in one specific situation: cropping something out because it is confidential. Cropping away a letterhead, a signature block, or a margin note does not remove it — anyone can widen the crop box or extract the page contents and see what you cropped. If the point is to make information inaccessible rather than invisible, redact it, and check the result by copying text from the finished file.
Where cropping earns its place
The most common use is reclaiming margins on scanned documents. A book or journal page scanned at A4 typically has substantial white borders, and on an e-reader or tablet those borders eat the screen and force the text down to an unreadable size. Cropping tight to the text block can easily double the effective size of the type on a small screen — for reading PDFs on a tablet it is the single most effective adjustment available.
It is also how you clean up documents that were assembled for a different purpose: removing the empty right-hand column of a two-up printout, trimming the header and footer from every page of a report before circulating an extract, cutting scanner shadow from the edge of a page, or straightening up a document where the pages were captured with inconsistent borders.
Two things are worth checking before you finish. First, apply the crop consistently — pages cropped to slightly different sizes look untidy when scrolled through and can print inconsistently, so use the same boundary across the document unless a page genuinely needs different treatment. Second, remember what a smaller page means for printing: a cropped page scaled up to fill a sheet enlarges the content, so text set at 10pt may print noticeably larger than expected, and anything intended for professional printing usually needs its margins left intact for trim and bleed.
Your files never leave your device
Cropping is performed in your browser, so scanned correspondence, contracts, and records are trimmed on your own device without being sent anywhere.
Most online PDF sites upload your document to their servers, process it there, and keep a copy for minutes, hours, or longer. PilotPDF works differently: the page downloads a small processing engine into your browser, and your file is opened and edited in your device's memory using WebAssembly. Nothing is transmitted, so there is nothing for a server to store, leak, or scan. You can even disconnect from the internet after the page loads and the tool keeps working.
Read more about how this works in our privacy-by-design explainer.