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PDF Page Size Analyzer

Find mixed Letter, A4, A3 and custom page sizes, odd rotations and cropped pages in any PDF, right in your browser.

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Accepted: .pdf,application/pdf

PointsMillimetresInchesHow far a page may be from a named standard and still be called by its name. Producers round A4 to 595 × 842 as often as they write it exactly.

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What this tool answers

A print shop rejects a job and says "your pages are not all the same size". A binding house asks whether page 47 is really A3. A colleague swears the document is A4 but every page prints with a white band down one side. All three questions come down to page geometry, and a PDF viewer will not tell you any of it.

This analyzer reads the raw page dictionaries and reports what each page actually is.

What it reports

  • All five boxes. MediaBox, CropBox, BleedBox, TrimBox and ArtBox, in points, millimetres or inches. MediaBox and CropBox are inheritable through the page tree, so a page that declares neither still has both — the tool resolves the inheritance rather than showing a blank.
  • The effective displayed size. /Rotate may be any multiple of 90, including negative values and values past a full turn. A 90°-rotated A4 page displays as landscape, and a checker that reads the MediaBox alone gets it wrong. The rotation is normalised to 0/90/180/270 and applied before the size is judged.
  • A named standard, with its deviation. "A4 (within 0.4 mm)" tells you far more than a bare "A4" or a bare 595.28 × 841.89. A0–A6, B0–B6, Letter, Legal, Tabloid, Executive, Half Letter, photo 4×6/5×7/8×10, US and EU business cards and DL envelopes are all matched, within a tolerance you set.
  • Groups, not rows. Pages are grouped by what they display as, so a long document reports "pages 1–398 A4 portrait, pages 399–400 A3 landscape".
  • The flags nobody else reports. Mixed sizes, mixed orientations, non-zero rotations, a CropBox that differs from the MediaBox, boxes that escape the MediaBox, and — the one that quietly breaks stamping, imposition and half the PDF libraries in existence — a MediaBox whose lower-left corner is not at (0, 0).

Limits

It reports the geometry the file declares. It cannot tell a deliberate fold-out from an accident, and it does not look at what is drawn inside the boxes.

Privacy

The file never leaves your machine. Parsing, measuring, thumbnailing and exporting all happen in your browser; nothing is uploaded and nothing is stored.