PDF page size
Find out what size the pages really are, in millimetres, inches, and points.
A small task starts here.
Drop your PDF here, paste it, or choose from your device.
Up to 100 MB · any PDF, locked or not · Processed locallyResult
Choose a PDF and the result appears here automatically.
PDF page size, without the extra steps.
Open a PDF and every page is measured: the size in all three units at once, the paper it matches, and whether the document is one size throughout or several. A page that is nearly A4 is the interesting case, so the report says how far off it is and in which direction, rather than rounding it to the answer you were hoping for. A password-protected file can still be measured — the lock is on the content, not the geometry.
How to use this tool
- 1Open a PDF. Nothing is uploaded.
- 2Read the size of every page, grouped so identical pages are one entry.
- 3Copy the figures, or download a spreadsheet with a row per page.
When PDF page size is the right tool
- A print shop says the file is not A4 and you cannot see anything wrong with it.
- A submission portal rejects the upload for being the wrong page size and will not say which page.
- A merged report has one landscape spreadsheet in the middle and you need to know which page it is.
- A scanned document came back very slightly smaller than the original and you want the number.
- A designer sent artwork with bleed and you need the finished trim size rather than the sheet.
- A form has to be filled at exactly the right scale and you need the page in points to lay it out.
The number in the file is not always the size of the paper
A PDF page can carry a rotation, so a landscape page is often stored as a portrait one with a quarter turn attached. Read the raw numbers and you will report 595 × 842 for a page that prints 297 × 210. Everything here is measured after the rotation is applied — what a reader shows and a printer images — and where a page is turned, the stored figures are named beside it so the two can be reconciled rather than argued about.
Nearly A4 is the answer worth having
A page is called A4 only when it is within about a third of a millimetre, which is enough to cover the ordinary rounding between 595 × 842 and 595.276 × 841.89. Within 3 mm it is reported as near A4 with the gap spelled out in both directions — 1.2 mm narrower and 0.4 mm shorter — because that is the sentence a print shop needs, and because rounding a not-quite page up to the name you hoped for is how the problem stays unsolved.
Crop, media, and trim are three different answers
The media box is the sheet the page was drawn on; the crop box is the part a reader displays; the trim box is where a printer will cut. Most documents set them all the same and the distinction never comes up. When they differ it is usually deliberate — artwork with bleed, or a page cropped down from a larger scan — so the visible size is quoted first and the others are named underneath, rather than one being picked silently.
A locked PDF can still be measured
Password protection stops pages being copied, printed, or altered. It does not hide how big they are, and the page geometry is readable without the password. So a protected file is measured here like any other, which is worth knowing when a portal has rejected a document you cannot open on the machine in front of you. Extracting or merging its pages, elsewhere on this site, is what the password actually prevents.
A few quick answers.
Open a PDF. Nothing is uploaded. Read the size of every page, grouped so identical pages are one entry. Copy the figures, or download a spreadsheet with a row per page.
Tool inputs are processed in your browser. Crate has no upload endpoint and no accounts. Downloaded site assets and a cookie-free page-view count still require a connection; your files and text are not included in those requests.
All of them. Pages that measure the same are gathered into one entry with the page numbers they cover, so a four-hundred-page document with one odd page tells you which page rather than printing four hundred rows.
Those are the same size in different units. PDF measures in points, which are 1/72 of an inch, so A4 is 595.28 × 841.89 pt and most files round it to 595 × 842. All three units are shown side by side here precisely so this does not have to be worked out by hand.
Usually a fraction of a millimetre from a document assembled out of two sources, or one page carrying a rotation the others do not. Each entry lists the pages it covers and the exact figures, so comparing two entries shows which it is — and a difference too small to see is still a difference a printer will act on.
No — this tool only measures. Resizing a PDF's pages means rescaling or repositioning what is drawn on them, which is a different job with real trade-offs about margins and content. Rotate PDF turns pages a quarter at a time, and that does change what this reports.