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How to crop a PDF to remove margins
Trim white margins or crop a PDF to a smaller area for cleaner printing, better reading on small screens, and tidier documents.
Wide white margins waste space and make documents harder to read on phones and tablets, where every bit of screen counts. Cropping a PDF trims away unwanted margins or focuses the page on a smaller area, producing a tighter, more readable document that also prints more efficiently.
This guide explains when cropping helps, how it works, and how to crop without accidentally cutting off content.
Cropping is about removing what you do not need around the edges of a page. Documents created for print often carry generous margins that look wasteful on a screen; scanned pages frequently include a border of grey or black around the actual content; and sometimes you simply want to focus on one part of a page rather than the whole sheet.
Trimming those margins makes the content larger relative to the page, which is easier to read on small screens and uses paper more efficiently when printed. The result is a cleaner, more focused document.
Cropping defines a smaller visible area within each page and trims away everything outside it. The content itself is not deleted so much as hidden beyond the new boundary, and the page size shrinks to the cropped area. You set how much to trim from each edge — top, bottom, left, and right — to frame the content the way you want.
Because cropping changes the page boundary rather than the content within it, the text and images inside the crop stay exactly as they were. Only the framing changes.
The main risk in cropping is trimming too aggressively and clipping content you meant to keep — a page number tucked in a corner, a footnote near the edge, or text that runs closer to the margin than you realised. Crop conservatively at first and check the result before trimming further.
It helps to look at the busiest pages, not just a typical one, since content sits closest to the edges there. A crop that looks safe on a sparse page might clip a header or a marginal note on a denser one. Verifying against the tightest page protects the whole document.
For a document where every page has the same layout, applying one consistent crop to all pages keeps things uniform and tidy. For a document where pages differ — some portrait, some landscape, some with different margins — you may need to crop pages individually so each is framed correctly.
Decide which situation you have before starting. A uniform document is quick to crop in one pass; a varied one needs a little more attention so that no page ends up with the wrong frame.
Once cropped, review the document at the size it will actually be used — on a phone if it is for mobile reading, or printed if it is for paper — to confirm the new framing works in practice. Cropping for the wrong context can look fine on a desktop but still feel cramped on a phone.
Keep the original uncropped file. Cropping is easy to redo from the original if you trim too much or need a different frame later, but recovering content from an over-cropped file is not. The original is your safety net.