How big is each page in your PDF, really? A file can mix sizes, and printers react badly to surprises. The PDF Page Dimension Viewer lists the width and height of every page in a table.
It is built for designers, print buyers, and anyone checking a file before it goes out. The tool only reads your PDF and reports numbers. It never changes the file or offers a download.
Table of Contents
- What the Tool Does
- How to Use It, Step by Step
- How It Works
- A Usage Walkthrough
- How to Read the Table
- Common Page Sizes
- Privacy and File Handling
- Limitations
- FAQs About the PDF Page Dimension Viewer
What the Tool Does
The tool has one upload area and one results table. There are no buttons or settings.
- An upload area labeled Drag & drop PDF to measure page dimensions. Click it, or drop a PDF onto it.
- A status line that starts as Ready.
- A table with four columns: Page, Points (pt), Inches (in), and Millimeters (mm).
- One row for each page, such as Page 1.
The table appears after the file loads. A note under it explains how the sizes are measured. Centimeters are not shown, so divide the millimeter values by ten.
How to Use It, Step by Step
- Click the upload area and choose a PDF, or drag one onto it.
- Wait while the status line shows Reading...
- Read the status line, which gives the file name and page count, and then the table below it.
- Pick a new file to replace the table with the next result.
The status line reads like PDF loaded. contract.pdf: 2 pages. A one-page file says 1 page. If the file cannot be read, a red message replaces the table.
How It Works
The tool opens your PDF and asks for the size of each page. It uses the area a viewer would show. That is the crop box if the page has one, otherwise the full page box. It applies page rotation, so a sideways page swaps width and height. Then it converts those two numbers to inches and millimeters.
Choose PDF>Read Each Page Size in pt>Show Table
- Inches equal points divided by 72, shown with two decimals.
- Millimeters equal points times 25.4 / 72, shown with one decimal.
- Points are shown with one decimal, with commas in large numbers.
A Usage Walkthrough
Elena receives a two-page contract and wants to know if it is Letter or A4. She chooses the file and the table appears. These are the two rows she sees.
| Page | Points (pt) | Inches (in) | Millimeters (mm) |
|---|
| Page 1 | 612.0 x 792.0 | 8.50" x 11.00" | 215.9 x 279.4 mm |
| Page 2 | 595.3 x 841.9 | 8.27" x 11.69" | 210.0 x 297.0 mm |
Page 1 is US Letter and page 2 is A4. Elena now knows the file mixes two paper sizes. She can fix that before printing.
How to Read the Table
Each size shows width first, then height. A page where the first number is larger is landscape. A page where the second number is larger is portrait.
The values match what a viewer shows, because the crop box and rotation are both applied. A Letter page rotated 90 degrees reads 792.0 x 612.0 points, 11.00" x 8.50", and 279.4 x 215.9 mm.
Common Page Sizes
Matching your numbers to a known size is the main use of this tool. These are standard values in points.
- US Letter: 612 by 792 points, or 8.50 by 11.00 inches.
- US Legal: 612 by 1,008 points, or 8.50 by 14.00 inches.
- A4: 595.28 by 841.89 points, shown here as 595.3 by 841.9.
Small rounding differences are normal. For a named size match, the PDF page size detector is a closer fit. The PDF page aspect ratio checker compares shapes instead of sizes.
Privacy and File Handling
The page loads pdf-lib and runs it in your browser. Your file is read into memory, and the measurements are done there. The code does not send the PDF to a server, and it creates no download.
The tool keeps no copy of your file. The pdf-lib script comes from a public code host, but your file is not part of that request.
Limitations
- The tool reports sizes only. It cannot resize, crop, or fix any page.
- It reads one file at a time. A new file replaces the old table.
- It shows page sizes only, with no paper names. UserUnit and other unusual scaling are not applied.
- Rotated pages are not flagged in the table. Only their swapped width and height show.
- Password-protected or damaged PDFs show no table. You see This PDF could not be read. It may be encrypted, password-protected, or corrupted.
- Files with hundreds of pages may take longer to list.
To act on what you find, use the Convert PDF to A4 tool or the resize PDF pages tool. To check page direction, try the PDF orientation detector. More tools are in the PDF tools hub.
FAQs About the PDF Page Dimension Viewer
Does this tool change my PDF?
No. It only reads the page sizes and shows them in a table. It has no download button.
Which units does the table show?
It shows points, inches, and millimeters. Centimeters are not listed, but you can divide millimeters by ten.
Is my file uploaded to a server?
No. The code reads the file in your browser with pdf-lib. It does not send the file anywhere.
Why might the size differ from the paper size I expected?
The table shows the visible area, so a crop box makes it smaller than the paper. Scaling set by other software may also change what you see.
What happens if I choose a file that is not a PDF?
The tool shows Please choose a PDF file. and no table.
What does a point mean?
A point is 1/72 of an inch. A Letter page is 612 by 792 points.
This tool runs in your web browser and may not handle every PDF file, font, or browser the same way. Keep a backup of your original file. Reviewed for general accuracy by Prof. Dr. Khalil Mudassar, PhD.