Crop PDF Pages Online Free — Trim PDF Margins
Crop and trim PDF page margins online for free. Set custom crop margins in millimeters and download the cropped PDF instantly.
Drop file here or browse
Maximum file size: 50 MB
Cropping a PDF removes unwanted margins, white space, or border areas from every page. This is particularly useful for scanned documents that have scanner-bed margins, or for removing headers and footers from PDFs before repurposing the content.
Enter the crop margin in millimeters for each side (top, right, bottom, left) and click Process. The tool sets the PDF crop box for each page using a server-side PDF engine, which tells all PDF viewers to display only the cropped area. The resulting PDF looks trimmed and clean.
For example, to remove 20mm from all sides of a scanned document, enter 20 in all four margin fields. To remove only the top header area, enter 25 in the top field and 0 in the others. Your cropped PDF downloads immediately — no watermarks, no account required, files deleted within one hour.
How to Crop PDF Online — 3 Simple Steps
- 1
Upload your file
Drag and drop your file onto the upload box, or click to browse. CocoPDF accepts a file up to 50 MB each.
- 2
Adjust the settings
Choose the options you need for Crop PDF. The default settings work well for most documents.
- 3
Download the PDF file
Click the process button. The file is generated on our server and your PDF download starts automatically.
Frequently Asked Questions
How do the margin values work?
The margin values specify how much to cut from each side in millimeters. A top margin of 10mm removes 10mm from the top of every page. Set all values to 0 to keep the original page size.
Does cropping affect all pages?
Yes. The specified crop margins are applied to every page in the PDF uniformly.
Can I crop to remove white borders around scanned documents?
Yes. This is one of the most common uses — scanned documents often have white margins from the scanner bed. Enter the approximate margin size in mm to trim them.
Does cropping permanently remove content?
Cropping uses PDF crop box metadata, which hides the cropped area but does not permanently delete it at the PDF specification level. In practice, all standard PDF viewers respect the crop box and hide the cropped area.