Trim the border off a PDF
Scanned pages come with wide white borders, slides carry a footer you do not want, and a diagram exported from a drawing program sits in the middle of an A4 sheet. Cropping removes the part you do not need from the visible page, so the document fits a screen better, prints with less waste and shows what matters.
Crop a PDF in five steps
- Choose the PDF or drop it on the page. Nothing is uploaded.
- Type how much to cut from the top, right, bottom and left, or drag an edge of the dashed frame on the page preview.
- Pick millimetres, centimetres, inches, points or a percentage of the page. The note under the fields shows the new page size.
- Leave the page field empty to crop every page, or enter pages such as
1-3, 5. Use the arrows to check other pages. - Press Crop and save PDF and download the result.
Detecting white margins
The button Detect white margins looks at the current page, finds the smallest rectangle that holds everything that is not white, and sets the four margins to match, with a thin border left around the content. It suits scans and exports. The same distances are then used for all chosen pages, so check a few pages: if one page has content nearer the edge, lower the margins by hand.
What cropping does to the file
The tool changes the visible area of each page, the crop box, and keeps the content outside it in the file. That is what makes the result exact and lossless, with no new compression. It also means the hidden part can be brought back by someone who knows how, so cropping is not a way to remove sensitive text or images. Pages that are stored rotated are handled by their displayed edges, so the left edge you see is the one that is cut.
Your document stays on your device
The page preview, the margin detection and the saving all happen in your browser. The PDF is not sent to a server, and your original file is not modified.