PDF page size checker
Find mixed A4, Letter, Legal, A3 and custom page sizes in PDFs before printing. Check visible page dimensions, rotation and orientation, then download a page-by-page CSV report.
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PDF page size checker
A printer warning about mixed page sizes does not tell you which PDF page differs. Upload the document or a set of PDFs to list every visible page size in millimetres. The checker identifies standard paper sizes, flags size and orientation outliers against your chosen expectation, and reports pages where CropBox and MediaBox disagree. Use the CSV page numbers to locate the source pages before fixing or re-exporting them.
How to use this tool
- Upload PDFs, drag them into the dropzone or import a direct public PDF URL. Try the mixed-size example first.
- Choose the expected paper size and orientation, or let the checker use the most common values in the uploaded pages.
- Review the flagged page preview and download the full page-by-page CSV plus a summary grouped by size and orientation. No PDF is changed.
Supported input formats
PDF
Available settings
- Expected paper size
- Expected orientation
Output and limitations
Find mixed A4, Letter, Legal, A3 and custom page sizes in PDFs before printing. Check visible page dimensions, rotation and orientation, then download a page-by-page CSV report.
Upload 1 to 20 unencrypted PDFs, up to 20 MB each, 50 MB total and 500 pages combined. Visible dimensions use each page's CropBox after rotation; the report also lists MediaBox dimensions and whether the boxes differ. Select an expected paper size and orientation or use the most common value. A custom size is grouped by its dimensions rounded to whole millimetres. The tool only inspects PDFs; it does not resize pages or guarantee printer margins, bleed or TrimBox conformance.
Does this show the printed page size or the content trim size?
The visible width and height come from CropBox after page rotation. The report also shows MediaBox and marks pages where it differs. A printer can scale or crop independently, and a separate TrimBox or bleed requirement needs its own preflight check. Use the CSV to locate pages and confirm the print settings with your printer.
How are custom sizes and rotated pages compared?
A4, A5, A3, Letter, Legal and Tabloid are recognized within 1.5 mm in each dimension. Other sizes are grouped by the shorter and longer visible dimensions rounded to whole millimetres. A 90° or 270° PDF rotation swaps reported width and height; orientation is checked separately from paper size.
What if processing fails?
Check the supported formats and file limits, then try a smaller file. Keep an original copy. A clear error message will explain an unsupported input or an unavailable processing service.