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Crop PDF margins
Remove the white margin so a tablet shows more page and less border.
Choose a PDF
or just drag it here.
.PDF ONLY · STAYS ON YOUR DEVICE
Turning pages does not change the frame. This way you can see whether it also fits the other pages.
When the file opens, the margin of the first page is measured once automatically. You can drag the frame yourself at any time after that.
This much space the measurement leaves around the text, so no letters get cut off.
Single pages with a comma, ranges with a hyphen. “4-” means: from page 4 to the end.
Drag the frame with your mouse or finger, use the handles to make it larger or smaller. With the keyboard: select the frame, then use the arrow keys, with Shift they change its size.
Next: Compress PDF · Organize & rotate pages · PDF → images
Your file does not leave this device. Measuring and cropping happen in your browser.
How it works
- 01Choose a PDF or drag it into the box. The margin of the first page is measured right away.
- 02Check the frame: if it fits, turn the pages and see whether it also fits the others. If not, drag it yourself or measure again.
- 03Choose which pages to crop: all, only the one shown, or a selection like 1-3,5.
- 04Tap “Crop margins” and download the new file. Your original stays unchanged.
What cropping does: Every PDF page has two boxes. The MediaBox says how large the sheet is, the CropBox says which part of it is shown. This tool only sets a new CropBox. Common PDF programs follow it: on screen, when printing and in the page thumbnails the margin is gone, and because the page looks smaller, the text gets larger on a tablet. The content outside the CropBox stays in the file, though. Anyone who opens the file in a PDF program can enlarge the CropBox again and bring the margin back. So this is no way to hide something confidential. For that there is Redact PDF.
How the measurement works: Your browser draws the page as an image. The background brightness is taken from the edge strip of that image. This also works with yellowed or grayish scans, not only with pure white. Everything clearly darker than this background counts as content. Single small specks are ignored, so a speck of dust or a scanner dot does not tear the frame open again. The chosen safety margin is added around the result.
Several pages: “Same frame” applies your frame proportionally to the other pages, so “8 percent off on the left, 5 percent off at the top”. This also fits when the pages have different sizes or portrait and landscape are mixed. “Measure each page” measures every page on its own instead. That is better for book scans, where the text shifts from page to page, but it takes longer, because every page has to be drawn for it. If the measurement finds nothing on a page, your frame applies there. The page shown always gets exactly the frame you see.
Rotated pages: If a page is in landscape or upside down, the frame is converted to match the page as you see it. This also applies to pages that were cropped before: they are then cropped further inside the existing area.
Limits: Password-protected PDFs cannot be opened. Not every program respects the crop area: if you later convert the cropped file to images on the command line, for example with Ghostscript, ImageMagick or pdftoppm, they take the whole sheet by default, and the margin is back. These tools have their own option for that. A scanner shadow or a dark strip at the edge of the sheet counts as content. Then the measurement removes less on that page, and you are better off dragging the frame yourself. Pages scanned at an angle are not straightened: the frame stays level, so with a strong tilt more margin remains at one corner. Headers and footers, page numbers and stamps in the margin are content and stay; if you want them gone, drag the frame tighter by hand. And the file size hardly changes, because nothing is removed. For that, use Compress PDF.