📐 PDF Page Size Checker
Analyze and check the dimensions of each page inside a PDF. Instantly verify standard layouts or find mixed dimensions.
Your file never leaves your device. All processing happens locally in your browser.
Check PDF Document Dimensions Locally & Online
Verifying the layout requirements of your print document, book layout, invoice structure, or architecture plan is easy with our local PDF Page Size Checker. In standard PDF viewers, page size features are buried. Our tool extracts exact dimensions for every page in standard points, millimetres, and inches, and maps them to named paper standards like A4, Letter, legal, or tabloid sizes.
If your document has mixed page sizes, this checker highlights those discrepancies immediately, coloring the layout differences in amber. You can download the report of your pages as a CSV spreadsheet. All operations run directly in Javascript inside your browser memory, ensuring your private PDF documents never exit your local device.
Frequently Asked Questions
How do I check if my PDF is A4 or Letter size?
Simply drag and drop your PDF here. The tool immediately extracts the points viewport sizes and matches them to standard paper dimensions. If all pages are 210 × 297 mm, it will proudly declare it A4 size.
What does "mixed page sizes" mean in a PDF?
Mixed sizes indicate that the pages within the PDF document are not uniform. For example, a document might have Letter size pages for contents and an A3 or landscape sheet for diagrams. Our checker lists and flags each of these anomalies.
How is PDF page size measured in points vs millimetres?
PDF documents default to User Unit coordinates, where 1 point equals 1/72 of an inch. A millimetre represents approximately 2.835 points. The tool converts points to mm and inches using standard math ratios.