Add Page Numbers to PDF

The formula

• Your PDF is opened in memory and each page's width and height are read.
• For every page, the tool computes the exact x/y position from your chosen corner and margin.
• The page number text is drawn onto the page with an embedded standard font.
• The updated document is saved locally as numbered.pdf and offered as a browser download.

A worked example

Opening contract.pdf (24 pages), choosing "Bottom center" with the "Page 1 of 24" format starting at 1, produces numbered.pdf with "Page 1 of 24" … "Page 24 of 24" stamped along the bottom of every page.

More about the Add Page Numbers

Plain numbers or 'Page X of Y'?

Bare numbers ('7') are the classic choice for contracts and reports that will be referenced by page. 'Page 7 of 40' is friendlier for handouts and guides, because readers can tell how far along they are, and spot immediately if a page is missing.

Think about how the document will be used. If people will say 'see page 12' on calls, plain numbers are cleaner. If it is a standalone reading document, the 'of Y' format earns its keep.

Starting from a number other than 1

Your PDF is chapter 3 of a larger report that starts on page 47? Set the start number to 47 and the numbering continues the real sequence, a small detail that makes compiled documents feel professionally assembled instead of stapled together.

Position matters too: bottom center suits formal reports, top right suits drafts and working papers. Keep the margin clear of existing footers so the numbers do not collide with your document's own footer text.

What numbering does to your file

Each number is drawn onto the page as an overlay with an embedded standard font, your text, images and layout are completely untouched. Because it is an overlay, it works on scanned documents too, with no OCR needed.

It is permanent, which is almost always what you want, but keep the unnumbered original until you are sure the placement is right. Re numbering a numbered file stacks two sets of numbers.

Numbering for print and binding

If the document will be printed double sided and bound, consider outside edge placement (bottom right on odd pages) so numbers stay visible near the thumb edge. For on screen reading, bottom center is the least distracting.

Leave enough margin: numbers placed too close to the edge can be clipped by printers with large unprintable areas. The default margin is safe for most printers; nudge it inward if your printer is aggressive.

When not to number

Do not number documents that already have printed page numbers. You will get collisions ('14' over '14') or mismatched sequences. This tool is for PDFs that lack numbering, not for fixing existing numbering.

Also skip it for one page documents and for files where page order is fluid (a deck you rearrange constantly). Numbering is for stable, multi page documents people navigate by reference.

Numbering multi file documents

When a report arrives as several PDFs (chapters, appendices), number each file with its real page range: file one gets 1 to 40, file two gets 41 to 75, and so on. Use the custom start number for each.

Then merge them in order. The result reads as one continuous document with correct pagination, far more professional than three files each starting at page 1.

Keep a note of the ranges (chapter1: 1 to 40, chapter2: 41 to 75). When chapter 2 gets revised and grows by three pages, you will know exactly how to renumber everything downstream.

Page numbers vs. logical page labels

PDFs have two numbering systems: the printed page numbers (what readers see) and the logical page labels (what the PDF viewer shows in its toolbar). They often disagree, a book's 'page 1' might be the PDF's page 15.

This tool adds visible printed numbers. If your document also needs the viewer's page labels to match (so 'go to page 50' lands on printed page 50), that is a separate step in a PDF editor, worth doing for long documents.

For most purposes, matching visible numbers are enough. But if readers will navigate by typing page numbers into their viewer, align both systems to avoid the off by fourteen confusion.

Numbering for double sided printing

For booklets printed double sided, position matters: odd numbers on the right (recto), even on the left (verso). The bottom center position works for both; bottom outer corners look more professional in bound documents.

Remember that the first printed page is often not 'page 1', front matter (title, contents) may be unnumbered, with numbering starting at the first chapter. Use a custom start number and skip numbering the front matter if your tool supports ranges.

Print a test copy before the full run. Pagination mistakes are invisible on screen and glaring on paper, one proof copy saves an entire misprinted batch.

Roman numerals for front matter

Theses, reports and books traditionally number front matter, contents, preface, acknowledgements, in roman numerals (i, ii, iii…) and switch to arabic (1, 2, 3…) for the body. It signals to the reader that this part does not count toward the real pagination.

Apply roman numerals to the first N pages, then restart arabic numbering where chapter 1 begins. Keep the font small and the position consistent, bottom centre is the safe default that offends no style guide.

How to use the Add Page Numbers

1. Click Choose PDF file and select the PDF you want to number.
2. Pick the number position (for example Bottom center), the format and the start number.
3. Adjust the margin and font size if the default look does not suit your document.
4. Press Add Page Numbers and wait for the stamping to finish.
5. Click Download PDF to save numbered.pdf to your device.