Square PDFs are useful for social media posts, product catalogs, photo books, and print materials. Here is how to crop or resize PDF pages to a square or any custom dimension for free.
Social media platforms like Instagram use square or near-square aspect ratios. Print-on-demand services for square cards, tiles, and merchandise require square page dimensions. Presentation slides sometimes use square layouts for modern aesthetics.
Decide on the square size. For a standard A4 portrait (210 × 297mm), a square crop at 210 × 210mm (cropping 87mm from the bottom) gives the maximum square from the page width.
Go to pdfeditor.onl/crop-pdf. Upload your PDF.
Set the crop so that the resulting width and height are equal. For example, to get a 210 × 210mm square from an A4 page, crop 87mm from the bottom (or adjust symmetrically from both top and bottom to center the crop).
Tip: For image-heavy PDFs where content is centered, crop equally from both top and bottom to keep the content centered within the square crop area.
Download the PDF and check the page dimensions in any PDF viewer (File → Properties in Adobe Reader). Confirm the width and height match your target square dimensions.
The crop tool removes content from page edges. For resizing to an exact non-standard dimension (e.g., 1080 × 1080px for Instagram), consider converting the PDF page to PNG first, then resizing the image, and converting back to PDF.
Yes. Cropping in PDF removes the content outside the new boundary permanently. Keep the original PDF before cropping in case you need the full content later.