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Crop box, lossless

Crop PDF margins

Cut the empty border off a scan or a print layout without touching the content, so the page fills the screen and the print.

Cropping happens in this browser tab. Your document is never uploaded.

Short answer: choose a margin preset or type the four margins in points, then press “Crop and download”. Cropping moves the crop box, so the text stays selectable and the file does not grow. It hides the trimmed area rather than deleting it.

What a crop box actually is

Every PDF page has a media box (the paper) and a crop box (what a viewer shows). Moving the crop box inwards is how print tools trim a document without re-encoding anything. Because the original content is still inside the file, a crop is not a privacy tool — for that you need redaction, where the content is removed, not covered.

When the border is the problem

Scans made on a flatbed often carry a wide white border, and a two-up print wastes half the sheet on it. Cropping to the text block fixes both. If the scan is also skewed, straighten it in an image editor first — this tool changes the page boundary, it does not rotate or deskew the pixels inside it.

Cropping questions

Does cropping a PDF delete the hidden content?

No, and this tool says so plainly. Cropping sets the crop box, which is the area a viewer shows. The rest of the page still exists in the file and a viewer that ignores the crop box can show it again. If you need content gone for good, redaction — not cropping — is the operation you want.

Why crop instead of re-rendering the pages?

Re-rendering turns selectable text into pixels and usually makes the file bigger. Moving the crop box changes four numbers, so the text stays selectable, images keep their original bytes and the output is the same size or smaller.

What units are the margins in?

Points, the unit PDFs use: 72 points make one inch, so a 36-point margin is half an inch. The presets cover the common print borders, and any value that would leave a page smaller than 20 × 20 points is refused.

Can I crop only some pages?

Yes. Choose “Only these pages” and give a range such as 2,4-6. A document with a different margin on its first page is the usual case.

Related tools

Rotate PDFFix the orientation before you trim.Organize PDFReorder and remove pages in one pass.Compress an imageShrink the scans before they become a PDF.