Crop a PDF: trim margins without sending the document
Crop PDF pages to remove margins or center content, with a visual preview — in the browser, no upload.
Published on 4 min readby Hamza El Hajjaji
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Table of contents
What cropping is for
Excessive margins from a scan, imposed headers from an export, white zones that dilute content: cropping tightens the visible frame around what matters. Result: a more readable, more compact document, better suited to projection or printing.
Important to understand: cropping defines the visible area of each page (the CropBox). Content outside the frame technically remains in the file — like a cropped photo whose original persists under the frame.
If your goal is to permanently remove content, cropping isn’t the tool. Safe removal requires fully validated rewriting — which is why redaction stays blocked until erasure of underlying data is demonstrated.
Use cases
Homogenizing a PDF assembled from sources with different margins.
Eliminating white borders from a scan before projection.
Recentering content shifted by a poorly calibrated export.
Reducing surface before compression to save weight.
After cropping
A tightened document lends itself well to page scaling or compression for a lightweight send — still in the browser.
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October 30, 2026·7 min read
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