PDF Page Size Checker

Before printing, submitting or merging PDFs it helps to know exactly what size the pages are: an A4 document that is really US Letter gets clipped or shrunk, and a booklet with mixed sizes prints unevenly. This checker reads every page of the PDF in your browser and reports its size in millimetres, inches and points, the matching standard paper name, orientation and rotation, plus crop and trim boxes, the PDF version and whether the file is encrypted.

How to use this tool

1. Drop one or more PDF files.
2. Read the size of page 1 at the top, and whether the file mixes page sizes.
3. Scroll the table for every page: size in three units, standard name, orientation and rotation.
4. Check the Notes column for pages whose visible area is cropped or that have a separate trim box.

Formula

mm = pt × 25.4 ÷ 72 · inches = pt ÷ 72

PDF sizes are stored in points, 72 to the inch. The size shown is the visible area (the crop box, limited to the media box), turned the way the page is displayed: a portrait page with a 90° rotation is reported as landscape. A page matches a standard size when both sides are within 2 mm of it, in either orientation.

Example

A page of 595.28 × 841.89 pt is 595.28 × 25.4 ÷ 72 = 210 mm by 297 mm — A4 portrait (8.27 × 11.69 in). A page of 612 × 792 pt is 215.9 × 279.4 mm, US Letter, which is 6 mm wider and 18 mm shorter than A4.