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Crop PDF — Trim Margins, Set Page Box

% or absolute · per-edge · in your browser · lossless

Drop one or more PDFs, choose how much to trim from each edge, and download the cropped result. The cropbox is what viewers and printers display — the underlying page content stays intact, so any crop is reversible by resetting the box.

Drop your PDF files here

Multiple files allowed · same crop applied to all

    no files
    Ready.

    When to use this tool

    Cropping a PDF is the right move when you want every viewer and printer to display only the inner part of each page — scans with broad whitespace, slides that came out boxed in, or a 2-up handout you want to chop in half. The PDF content itself isn't deleted; just the displayed window.

    How to crop a PDF

    1. Drop the PDFs. The same crop is applied to every page of every file in the batch.
    2. Pick a unit. Percent is easiest for "trim 5% off every side"; mm or pt are better when you need an exact crop.
    3. Enter values per edge. Values are the amount to remove from each edge — 10 mm at top means the displayed page starts 10 mm down from the original top.
    4. Click "Crop & download". Each output gets -cropped.pdf appended.

    FAQ

    Is content lost when I crop?

    No — only the displayed window changes. Resetting the crop in any PDF tool gets the full page back. If you need a destructive crop (smaller file, content actually removed), flatten the cropped PDF.

    What about mixed page sizes?

    Percentages adapt to each page; mm/pt apply the same offset, so pages of different sizes end up with the same absolute margin trimmed.

    Are my files uploaded?

    Never — this runs entirely in your browser via pdf-lib. See the privacy policy.

    Does cropping delete the content outside the box?

    No. A crop changes the visible window — the CropBox — and the content outside it is still in the file and can be recovered by cropping back out. If the point is to remove something, that is redaction, not cropping.

    How do I crop all the pages at once?

    The crop you set is applied to every page. Use percentage trimming when the pages are different sizes, since a percentage adapts and an absolute box in millimetres does not.

    How do I remove the white margins of a scan without measuring them?

    Use Auto-crop margins instead — it finds the content box on each page and crops to it, with an adjustable tolerance for scanner grey.

    Can I crop a scanned book spread into two pages?

    Cropping cannot split a page in two. Split pages in half does exactly that, and produces two real pages rather than one page with a narrower window.