Number PDF Pages
Quickly add sequential page numbers to your PDF. Pick a corner or bottom centre placement, choose the starting number and font size, then download the numbered PDF instantly. All processing runs in your browser.
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How it works
pdf-lib measures each number's width in Helvetica at the size you pick (10, 12, or 14 points), so a bottom-right or top-right number ends 28 points from the right edge whether it has one digit or four. Bottom centre puts the middle of the number on the page's centre line. The count goes up by one per page from your start value.
Processing runs in your browser
All processing happens inside your browser. pdf-lib modifies the document structure entirely in memory. Our servers are not involved at any point.
Related operations
For adding a diagonal text watermark to every page, try PDF watermark. To join several numbered files into one, use merge PDF. For turning sideways pages upright before numbering, see rotate PDF.
Frequently asked questions
- Which position should I choose for page numbers?
- Bottom centre is the most common convention for printed documents. Bottom right is common for reports. Top right is often used in academic papers and legal documents.
- Can I control the font size of the page numbers?
- Yes. Choose Small (10pt), Medium (12pt), or Large (14pt) from the size options.
- Can I choose the colour of the page numbers?
- Yes. Choose Black for full contrast or Gray for a more subtle appearance.
- Will the page numbers be searchable or selectable?
- Yes. The numbers are drawn as real text in the PDF using the Helvetica font, so they remain selectable and searchable.
- Is this tool free?
- Yes, completely free. No account, no sign-up, and all processing runs in your browser.
Last reviewed September 30, 2026
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