PDF Page Size Checker
Inspect every page's dimensions, orientation, and whether it matches a standard paper size like A4 or Letter — read directly from the file, no upload required. Useful before printing or merging documents with mismatched page sizes.
Page sizes are analyzed on your device instantly, and the file is never uploaded to our servers.
Drag a PDF file here or choose one
One file at a time
What this tool does
Analyses every page in a PDF and reports its size in points and millimetres, its orientation (portrait, landscape or square), and the standard paper format it matches if it matches one. Inspection only — it never modifies the file.
When to use it
- A file is going to print and you want to confirm every page is one consistent size first.
- A document ended up with mixed sizes after merging files from different sources.
- You need to know whether a file is A4 or Letter — a small difference that reliably ruins printing.
- A page prints with odd margins and you want to know whether a non-standard size explains it.
How to use it
- Put a PDF on the drop area or choose it from your device.
- Wait for "Analyzing page sizes..." to finish.
- Read the table: each page's size in pt and mm, its orientation, and its standard size.
- Use "Check another file" to move on to a second document.
A practical example
Input
A 12-page document assembled from two different files.
Output
A table showing pages 1–8 as A4 portrait and pages 9–12 as Letter — which explains the inconsistent margins when printing.
Limitations
- This tool reports sizes, it does not change them; to make them uniform use the Resize PDF Pages tool.
- A standard format name is only shown on a match within two points. Anything else is reported as non-standard rather than rounded to the nearest name.
- A rotated page is reported at its stored size, which can differ from the orientation a reader displays it at.
Privacy and processing
The analysis runs on your device the moment you pick the file; neither the document nor any of its data is uploaded.
Technical notes
- Sizes are read in points, PDF's native unit: 72 points = 1 inch.
- Standard-format matching allows a two-point tolerance in either dimension, so a slightly rounded A4 file is not reported as non-standard over a trivial difference.