Crop PDF margins online
Trim visible page margins in millimetres.
Drop your PDF files here
Or choose them from your device to get started.
50 MB total · No uploads
Set margins and optionally select pages. Cropping is not redaction.
Download the two-page practice PDF. Set 5 mm on every edge of the Letter sample. Expect a smaller visible box; inspect the original headings and footers.
How to use Crop PDF
Set a measured trim on selected pages
Margins are in millimetres. Start small; content outside the crop can remain in the file.
Crop PDF
Keep the source, run the task and inspect the result before accepting it.
Compare visible boundaries
Compare the saved copy with the practice result described above before using your own document.
Crop PDF margins online for free
Set top, right, bottom and left trims in millimetres. Apply the crop to selected upright pages or leave Pages blank for every page. Processing stays on your device.
A practical example
Start with 5 mm on each edge of one page and inspect headings and page numbers. The guide below includes a source and a measured cropped result for comparison.
What to check in the result
This is manual margin cropping, without automatic border detection. Content outside the crop boundary can remain in the file. Cropping is not secure redaction or a promise of smaller bytes.
Supported files and limits
Use valid, unencrypted PDF files, within 50 MB total input. Complex files may exceed device memory.
Local document processing · File privacy and website requests.
Help with this task
Questions & answers
Can I crop a PDF online for free on a Mac?
Yes. Open this browser tool, choose your PDF and enter margins in millimetres. Select Crop PDF and inspect the downloaded copy. No account or desktop installation is required.
Does this automatically detect blank borders?
No. Enter the trim for each edge manually. Try a small crop on one page and check its headings, footers and page numbers before processing more pages.
Does cropping permanently erase hidden content?
No. Content beyond the crop boundary may remain in the PDF. Do not use cropping to remove confidential information.