Measure PDF dimensions in mm, cm, inches or pixels

View the exact page size of a PDF in multiple units: mm, cm, inches, points and pixels at 72/96/300 dpi. Automatically detects A4, Letter and other standard formats.

Choose your PDF

Drop here or click to choose

Files stay on your device — nothing is uploaded

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Your file is processed in your browser and never uploaded.

How does it work?

1
Choose your PDF
Drag the PDF here — the dimensions appear immediately.
2
Choose the unit
Switch between mm, cm, inches, points or pixels at different dpi.
3
Check
Read the dimensions per page.

Frequently asked questions

Why does the page size differ from what I expected?

PDF dimensions are always in points (1/72 inch). If a PDF was created with a screen (96 dpi) or print (300 dpi) setting, the point values may differ from what you saw in the original document.

What is the difference from the page size checker?

The same! This is a more detailed version with more units, including pixels at different resolutions — useful for web design and print work.

Are my files uploaded?

No. Everything happens in your own browser. Your file never leaves your device and is not stored anywhere.

Is it free?

Yes, completely free, without watermark or account. The site is paid for by ads.

Why in the browser?

PDFrust runs entirely in your browser using WebAssembly and modern JavaScript libraries such as pdf-lib and PDF.js. Your file is never sent to a server — all processing happens locally on your device. This means your documents remain private by design, regardless of what they contain. There is no account required, no file size limit, and nothing is stored after you close the tab.