A merged report, a scanned contract, a thesis assembled from separate chapters — documents built from pieces almost never carry usable numbering. Upload your PDF above, choose the position and format, set where the count starts, and download a properly paginated file.
Below: how to handle a cover page and front matter properly, why "Page 1 of 10" is worth more than a bare number on anything legal, and what to do when your document already has numbers printed on it.
One idea makes every numbering decision straightforward, and it is the thing people get tangled in.
Every PDF has a physical page position — the first sheet is position 1 whatever is printed on it. Separately, there is the label you stamp onto the page, and the two do not have to match.
That is why the two settings exist. Which pages to number selects the physical positions that receive a stamp. Starting number decides what the first stamped page is called. Once you see them as separate questions, every layout follows:
The format choice looks cosmetic. On legal, financial and official documents it is not.
A bare number tells a reader where they are. "Page 3 of 12" tells them whether anything is missing. If a page is removed from a contract, lost from a fax, dropped by a scanner or omitted from a printed bundle, the total makes it immediately visible. With plain numbers, a missing page 7 between 6 and 8 is easy to overlook and impossible to prove.
This is why courts, law firms and finance departments generally require it, and why it is the right default for contracts, tenders, invoices, signed agreements and anything you might later need to show was complete.
For a novel, a newsletter or an internal handout, a plain number is cleaner and perfectly fine.
Where you put the number matters more once a document leaves the screen.
Bottom centre is the safest choice overall. It survives single-sided and double-sided printing, ring binding, stapling and hole punching, and it never collides with a binding edge.
Bottom outer corner — right on odd pages, left on even ones — is the book convention and reads well when printed double-sided, since the number always falls on the edge a reader's thumb turns. If your tool applies one fixed corner to every page, bottom right is the usual compromise.
Leave enough margin. Home and office printers cannot print to the very edge of the paper, and most reserve a few millimetres. A number placed too close to the edge can be clipped entirely. Keep it at least 10 mm in, and further if the document will be professionally bound, where the inner margin gets eaten by the spine.
Check for collisions. Scroll through the preview and look for pages where the number lands on top of a footnote, a footer, a table that runs long, or a full-bleed image. Moving it a few millimetres is easier than discovering it after printing 200 copies.
This is the awkward case, and it comes up constantly with merged documents and scans.
Adding numbers stamps a new layer on top; it cannot remove what is already printed on the page. So a merged bundle where each original had its own numbering will now show two sets — the old one restarting at 1 several times, and the new continuous one over it.
Three ways out:
Place the new numbers somewhere else. If the originals are numbered bottom centre, put yours top right. Two numbers in different positions is a normal convention — court bundles do exactly this, with original pagination left intact and a continuous bundle number added in a corner.
Cover the old ones. Position the new numbers over the old and give them an opaque background if the tool allows. Workable, though it can look untidy.
Crop them off, if the originals sit in a generous margin. Crop PDF trims the strip containing them — but remember cropping only hides content, so the old numbers technically remain in the file.
Order matters. Number last, after the document is final.
Merge your files first, delete any blanks the scanner picked up, rotate anything sideways, and only then number. Add a page or remove one afterwards and the entire sequence is wrong, with no way to fix it except renumbering from scratch.
If the document is also going to be signed, number before signing. Adding anything to a PDF after a certificate-based signature invalidates it.
Preparing a bundle? Merge PDF combines the documents first, Delete Pages removes blanks, Watermark PDF adds a draft or confidential mark, and Sign PDF comes last of all. Browse all PDF tools.