100% Free
In-browser
Custom format
Add Page Numbers to PDF Free
Number your PDF pages automatically. Choose header or footer position, font size, and custom starting number. Private and instant.
Drop a PDF here or click to browse
Upload PDF • Configure numbering • Download
Dead simple
How to add page numbers to a PDF
1
Upload your PDF
Drop or select your PDF. The page count is detected automatically.
2
Configure numbering
Choose position, format (Page X of Y), font size, and starting number.
3
Download numbered PDF
Click "Add Page Numbers" and download the PDF with numbers on every page.
Why JustDownSize
Number PDF pages privately
Most page numbering tools upload your document to a remote server. JustDownSize adds page numbers entirely in your browser using PDF-lib — no server interaction, no storage, complete privacy for your documents.
100% Private
Files never uploaded
6 positions
Header & footer options
Number formats
Got questions?
Frequently asked questions
Yes, completely free. No account, no page limits, no watermarks on output.
Yes. Set the "Start from" field to any number. This is useful when numbering sections of a larger document that already has pages before the ones you're numbering.
The tool numbers all pages. To skip the cover page: use our Split PDF tool to extract the cover separately, number the remaining pages, then Merge PDF to combine them back together.
No. The page numbering runs entirely in your browser using PDF-lib. Your document never leaves your device.
Page numbers are added using Helvetica, a clean and universally readable sans-serif font embedded in PDF format by default.
Yes. Page numbers are added as a text layer on top of each page regardless of whether the PDF is text-based or a scanned image.