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Crop PDF Online

Crop PDF pages in your browser: drag a box, trim scans and margins per page. Nothing is uploaded.

Runs in your browser — nothing is uploaded. Verify it

About the Crop PDF Online

Crop PDF pages in the browser: drag a box over the part you want to keep, page by page, and download the trimmed file. The document is read and rewritten inside the tab, so a scan of a passport, a shipping label or a signed contract never leaves your computer.

A PDF crop looks like a cosmetic job and is usually a practical one. A flatbed scan arrives with a two-centimetre black edge down one side and wastes half the sheet when it prints. A shipping label is one PDF page with four labels on it and needs to be one label. A fax header sits above the text you actually need to send on. And a print-ready file from InDesign carries a visible area smaller than the physical sheet, so anything placed against the sheet edge disappears the moment it is printed. The four biggest online croppers upload the file, keep it for an hour and crop every page the same way; the files people crop are the ones they least want to hand to a server.

How to use the Crop PDF Online

  1. Select your PDF, or drop it in. It is read in the browser and stays on your device.
  2. Drag a box over the part of the page you want to keep — or press Detect margins and the box snaps to the content. Use the arrows to move between pages; each page keeps its own crop.
  3. Choose whether the crop applies to this page or every page, then download the cropped PDF.

Frequently asked questions

Is my PDF uploaded to a server?

No. The file is opened, cropped and saved inside your browser tab, so nothing is transmitted. You can load the page, disconnect from the internet, and crop a document to confirm it — there is no server step to call.

Can I crop each page differently?

Yes, and that is the point. Every page keeps its own box, so a scanned bundle with a portrait cover, a landscape invoice and a page with a wider margin is handled without splitting the file. The scope control applies one page's box to every page when you would rather crop them all the same way.

What does cropping actually change in the file?

It sets the page's visible area (the CropBox), and by default shrinks the physical sheet (the MediaBox) to match. The page content — text, fonts, images and vector art — is copied through untouched, so nothing is re-rendered, text stays selectable and searchable, and the file stays the same quality it was.

Why does the crop land in the wrong place on some PDFs?

Because a page has two rectangles and most tools only know about one. The MediaBox is the physical sheet; the CropBox is the part a reader shows; and a scanned page is often stored sideways with a rotation instruction on top. A crop drawn on screen is in the rotated, visible space, so it has to be mapped back through both before it is written. This tool does that, which is why the box you draw is the box you get on pages rotated 0, 90, 180 and 270 degrees, and on pages already carrying a CropBox.

What does "Detect margins" do?

It renders the current page, finds the bounding box of every pixel that is not paper-white, and sets the crop to that box plus a two-millimetre margin. It is measured against the page rather than assumed, so a black scanner edge, a fax header, a photograph that bleeds to the edge and a signature hanging outside the text block are all handled — the box follows the ink.

Will it crop a password-protected PDF?

Not while it is protected. Cropping rewrites the page dictionary, and a protected file stores its objects encrypted, so the result would be a document no reader could open. The tool says so by name instead of producing a broken file. Remove the password first, crop the file, then re-protect it if you need to.

What if the box is the whole page?

Then there is nothing to crop, and the tool says so rather than writing a crop entry that means the same as the default and reporting success. Drag the box in from the edges first.

Does cropping reduce the file size?

Only slightly. The page boxes are a few numbers in the file; the content stream, images and fonts are unchanged, so a cropped scan keeps its full resolution. If the file is too large, compress it after cropping — and crop first, because the page boxes are what the compressor works within.

Is there a limit on file size or how many documents I can crop?

No. There is no daily cap, no account and no watermark, because the work happens on your own machine and there is no server cost to ration. Very large documents are limited only by your browser's memory.

Guides

  • Crop PDF Pages Individually, Not All at Once

    How to crop PDF pages individually rather than applying one crop to the whole document — and why the box you draw lands in the wrong place on some files.

  • How to Add Page Numbers to a PDF (and Why They Go Missing)

    Page numbers are easy until the number lands somewhere the reader cannot see. How to number a PDF properly, why "Page 1 of 10" and "Page 1 of 20" are both right, and the cropped-page trap that hides the number on print-ready files.

  • JPG to PDF: How to Turn Photos and Scans into One PDF

    Converting images to a PDF is a container operation, not a re-compression — a JPEG goes in untouched. How to make one PDF from a folder of photos, which tools actually keep the file on your device, and why your pictures come out sideways.

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