How to use the PDF Page Size Checker
- Choose a PDF, or try the example.
- Read the summary of page sizes and the size, paper format and orientation of each page.
- Download the report as CSV if you need to keep or share it.
Supported files and limits
- Sizes are measured from the visible page area (the crop box) and include page rotation, as a PDF viewer shows them.
- A4, A3, A5, US Letter and US Legal are recognised within 1 mm. Other sizes are shown as Custom.
- Password-protected PDFs are not supported. Up to 2,000 pages and 50 MB.
Common questions
How big is an A4 page?
A4 is 210 × 297 mm, about 8.27 × 11.69 inches. US Letter is 8.5 × 11 inches, or 215.9 × 279.4 mm, slightly wider and shorter.
Why does a portal reject my PDF for its page size?
Many filing and printing portals accept only A4 or Letter pages. A single scanned or merged page in another size is enough for a rejection. This tool shows which pages differ.
How do I fix pages with different sizes?
Use the free Make PDF Pages the Same Size tool to put every page on A4 or US Letter without cropping.
Is my PDF uploaded?
No. The PDF is read in your browser, and it is never sent to our server or anyone else.