PDF Page Counter & Size Checker
Reports a PDF's page count, page dimensions and orientation locally in the browser.
Page counter & size checker
Drag & drop a PDF here, or
Processed on your device — never uploaded.
How to use this calculator
- Drop in a PDF.
- Read the page count, page size, orientation and file size.
How it works
Reads the PDF locally with pdf-lib and reports its structure — nothing is uploaded or changed.
Worked example
Check before printing. Confirm a document is 24 pages of A4 portrait before sending to print.
Tips
- Your files are processed locally in your browser. They are not uploaded to Zerdly.
Frequently asked questions
Does it change my file?
No — it only reads and reports; your file isn't modified or uploaded.
Why are sizes in mm?
PDF pages are stored in points; this converts them to millimetres for readability.
Related tools
- PDF Split Tool
- Image DPI / Print Size Calculator
- Local PDF Merge Tool
- Delete PDF Pages Tool
- Image Compressor
- Image Resizer
Explore more in PDF, Image, File, Data & Developer Tools.
Cite this tool
Zerdly. (2026). PDF Page Counter & Size Checker. Retrieved from https://www.zerdly.com/tools/pdf-page-counter/
Tip: Enter any known values to calculate the remaining results.
Designed to run locally in your browser. Tool inputs are not intentionally stored by Zerdly unless stated otherwise.