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PDF Page Size Checker

Check every PDF page locally for A4, Letter or custom dimensions, mixed sizes, rotation, and CropBox versus MediaBox differences before print or submission.

Check every PDF page size before printing or submitting

Drop one PDF to identify A4, Letter or custom pages, mixed dimensions, portrait/landscape rotation and CropBox differences. The PDF bytes stay in this browser tab.

Local PDF check · every page · no upload

1 · Choose a PDF

Inspect the whole document, not only page 1. A PDF can quietly mix A4, Letter, landscape and cropped pages.

Drop a PDF here or choose a fileAnalyzed locally in your browser. Nothing is uploaded to WebToolArc.

Display unitsStandard-size tolerance (mm)

Choose a PDF or load the mixed-size sample.

Privacy: parsing is local. The page may load the open-source PDF parser library from a public CDN, but your PDF file is not sent to that CDN or to WebToolArc.

2 · Page-size verdict

The quick verdict uses the effective CropBox when present and reports MediaBox separately so print/preflight differences are visible.

Waiting for a PDFPage sizes, orientation and box differences will appear here.

Pages—

Dominant size—

Size groups—

Rotation / crop—

Page	Standard	Effective size	Orientation	Rotation	MediaBox	CropBox	Flags
Choose a PDF to inspect every page.

Resize PDF pages PDF file-size analyzer Rotate PDF All PDF tools

Advanced mixed-size review & CSV workflow legacy per-page dimensions · grouped mixed-size audit · CSV handoff

Choose PDF

—Pages

—Distinct sizes

—Portrait

—Landscape

Choose a PDFPDF points use 72 points per inch.

Mixed-size review & CSV handoff

Summarize page-size groups and orientations from the existing local PDF inspection table.

PDF evidence

Group	Pages	Count	Review

Core Before exporting the PDFs

Use a focused flagship page for the six highest-demand PDF jobs; specialist PDF tools remain available from the full hub.

All 44 PDF tools

Merge PDFCombine multiple PDFs Split PDFExtract ranges or separate pages Compress PDFReduce PDF file size PDF to JPGTurn PDF pages into images JPG to PDFTurn images into one PDF Organize PDFReorder, rotate or delete pages

Practical guide and verification

Which PDF box matters

PDF pages can define MediaBox, CropBox, BleedBox, TrimBox, and ArtBox values. What a viewer shows or a printer uses can depend on which box is relevant to the workflow.

Points and physical size

PDF page coordinates are commonly expressed in points, with 72 points per inch. Converting those coordinates to inches or millimetres is straightforward, but it does not describe raster-image resolution inside the page.

Common mistake

A PDF that displays as A4 or Letter may contain a different underlying media box or crop box. Do not assume the visible window size is the complete production geometry.

Print-target page-size tolerance preflight

After the primary PDF checker reports page dimensions, use this preflight to test a page list against A4, US Letter or a custom print target. Set a millimetre tolerance and choose whether rotated orientation is acceptable; every page is classified with its width/height deviation instead of only reporting distinct sizes.

Pages — page,width_mm,height_mm,rotationTarget sizeCustom width (mm)Custom height (mm)Tolerance ± mmOrientation policy

—Pages checked

—Within tolerance

—Out of tolerance

—Largest dimension deviation

—Rotated pages

Page	Measured	Target	Δ width	Δ height	Status

Ready.

This audit uses the dimensions entered or reported by the browser-side checker. PDF MediaBox/CropBox/BleedBox/TrimBox/ArtBox can differ; print production should confirm the box required by the printer.

PDF processing boundaries

These tools operate within browser memory and the capabilities of the browser PDF libraries used on this page. Encrypted, malformed, scanned, XFA, unusual forms, complex signatures, OCR-dependent documents, and advanced desktop-editor features can require specialist software. Always verify generated files before discarding the source.

How to use this PDF Page Size Checker

Review mixed page sizes locally in points, inches, and millimeters.