How to Add Page Numbers to a PDF

You've assembled a 60-page report from several source documents, and now someone on the review call says "can you check the third paragraph on page 14" — except there's no page 14 printed anywhere on the file, just an endless scroll of unlabeled pages. Page numbers are a small detail that makes a document navigable, and adding them by hand in each source file before merging is exactly the kind of tedious step this tool exists to skip.

What you can actually configure

This tool keeps things simple by design: you choose a position — bottom center, bottom right, bottom left, top center, top right, or top left — and a starting number. Every page in the file gets a plain number (1, 2, 3…) stamped in that spot, counting up from whatever number you start at. There's no "Page 1 of 12" label format, no Roman numerals for front matter, and no option to skip numbering a cover page — it applies the same plain numbering to every page in the file, uniformly.

How to add page numbers

1. Open the Page Numbers tool and add your PDF.
2. Choose where the number should print — bottom center is the most common convention.
3. Set the starting number — 1 for a document numbered from its first page.
4. Click "Run & download." Numbers apply to every page, immediately.

Handling a document with a cover page or front matter

Since numbering applies to every page uniformly, a document with a cover page you don't want numbered needs a small extra step: split the cover page off first with Split PDF, run page numbers on just the remaining content (starting at 1), then merge the untouched cover page back on top with Merge PDF. It's two extra steps, but each one is instant, and the result is a properly numbered document with an unnumbered cover.

The same split-number-merge approach works if you need a document that starts numbering mid-way — say a second volume that should continue from page 101 rather than restart at 1. Set the starting number to 101 on that file before merging it in.

Why this runs in your browser, not a server

Stamping a number onto each page is the same kind of lightweight drawing operation as adding a watermark — pdf-libdraws the text directly onto each page's content, without needing to render or rasterize anything. The whole file is processed and re-saved locally, so it never has to leave your device to get numbered.

Common questions

Can I use "Page 1" instead of just "1"? Not directly through this tool — it stamps plain numbers only. If you specifically need a labeled format, add the numbers here, then use Edit PDFto manually add the word "Page" in front on pages where it matters.

Will numbering increase the file size?Negligibly — you're adding a few characters of text per page, not re-encoding any content.

Can I remove numbers after adding them?There's no built-in undo once you've downloaded the result — keep your original file until you're confident the numbering looks right.

What if I number the wrong pages?Just re-upload your original (unnumbered) file and run the tool again with corrected settings — nothing about the first attempt is permanent until you've replaced your working copy with it.