PDF Page Size Analyzer
Measure every PDF page, recognize common paper standards and find mixed dimensions or orientations before printing.
See exactly how your PDF pages are sized
Mixed page sizes are easy to miss on screen but can cause scaling, clipping and inconsistent print output.
Millimeter dimensions
Measure portrait, landscape and square pages and display their width and height to one decimal place.
Paper-size recognition
Recognize common ISO A-series and North American sizes including A4, A3, Letter, Legal and Tabloid.
Mixed-size detection
Group matching dimensions and show which page numbers belong to each size and orientation.
How page dimensions are measured
Setpdf reads each page's PDF viewport at a scale of 1. Width and height in points are converted to millimeters using the PDF standard ratio of 72 points per inch. The analyzer then groups equal dimensions and compares them with common paper standards.
Page-size limitations
The reported viewport represents the page boundary exposed by the parser and may reflect crop or rotation settings. Printers can apply additional margins or scaling. A near-standard size is labeled only when it falls within the tool's tolerance; custom sizes retain their measured dimensions.
Tools for inconsistent page dimensions
Use page organization and combination tools to rotate, reorder or rebuild documents that contain unexpected sizes and orientations.
PDF page size questions
How do I know whether a PDF is A4 or Letter?
A4 is approximately 210 × 297 mm, while US Letter is approximately 215.9 × 279.4 mm. The analyzer compares the measured dimensions and labels matching standards.
Can one PDF contain different page sizes?
Yes. PDFs created by merging files, scans or exported worksheets frequently contain mixed dimensions and orientations. The report groups them and lists their page numbers.
Why does the printed size differ from the reported PDF size?
Printer drivers may use fit-to-page, shrink oversized pages or add non-printable margins. The analyzer reports the PDF page boundary, not the final printer configuration.