PDF

Crop PDF margins: understand what stays in the file

CovertonUpdated 2026-10-08

Cropping changes the PDF's CropBox to reduce the area shown by the viewer. Content outside that area is not securely removed from the file, so this operation is unsuitable for deleting personal information.

Open the tool →How to use this tool ↓

Crop PDF margins — This illustration explains the tool's workflow. It is not the processed result of an uploaded file.

How to use this tool

Choose files in PDF format. Maximum files per batch: 1.
Review Top crop (mm), Right crop (mm), Bottom crop (mm), then start processing.
Download the PDF result and check its content and quality.

Choose the right settings

Enter the top, right, bottom and left reductions in millimeters. The same values apply to every page, so begin with small reductions if the document mixes page sizes or orientations.

Supported input: PDF
Output: PDF
Available settings: Top crop (mm)
Right crop (mm)
Bottom crop (mm)
Left crop (mm)

Before you start

Define the document’s purpose

Keep the original and decide whether you need changed pages, a new document, extracted information or a report. A readable page is only part of a PDF: forms, bookmarks, annotations and existing signatures may also matter. Check this guide’s supported features before choosing the result for a formal submission.

For a tool that selects pages, distinguish positions in the file from numbers printed on the pages. For a document created from entered values, review the source values and their order instead. If size, placement or print layout can be set, test a page with dense text or content close to an edge before applying the choice more widely.

Make a short plan of the source files, their order and the changes you intend. For an existing PDF, note any page selection and the functions that must survive; for a newly generated document, keep the values from which it is built. If a problem appears only after a later operation, compare the intermediate copy with the original to locate the first change. Record the settings needed by the recipient, so a visually acceptable trial is not mistaken for a document that meets every requirement.

Check content and document behavior

Open the saved file and inspect the beginning, end and any place where content was moved, combined or divided. Compare counts and values with the source or your input list. When the output is a report or extracted text, check a few findings on the actual pages rather than treating an empty report as proof that nothing relevant exists.

If printing is the purpose, use print preview and a test sheet to check reading size and placement. Where interactive fields, links or signature verification matter, test them separately; appearance does not establish that they still work. If processing fails, review protection, format and the stated limits without discarding the original.

Example input and output

PDF + top/right/bottom/left margins → cropped view

Examples describe the workflow. Results depend on the source file and settings.

Check the saved result before using it

Inspect all edges of the smallest and rotated pages. Check for clipped text, numbers or annotations and open the saved PDF in another viewer to review the displayed region.

If the result is different from what you expected

Reduce the margins if the remaining area becomes too small. Hidden content may still be present, so use a separate secure-redaction workflow when the requirement is actual information removal.

Limits to keep in mind

Cropping the page box can hide content without securely deleting it. Do not use cropping for redaction.

Continue with a related tool

Merge PDF files

Decide the order before combining documents for a submission, such as a form and supporting PDFs. Seeing all pages in the combined file does not establish that bookmarks, attachments or other document-level structures were carried over completely.

There are no additional merge settings; pages are copied in the order of the file list. Check which document comes first and rearrange the list before processing when the submission requires another order.

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Split a PDF

Decide whether recipients need individual pages or fixed groups of pages before splitting a PDF. Grouped splitting follows a page count rather than recognizing chapter headings or the meaning of the document's content.

Select single-page splitting or grouped splitting with the required group size. If the total is not divisible by that size, the last output contains the remaining pages and is shorter than the earlier groups.