Free · No sign-up · Runs in your browser

Add page numbers to a PDF.

Stamp clean page numbers onto every page — pick the position, the starting number and the format, without a single page leaving your device. Password-protected PDFs need unlocking first.

Not uploaded — nobody sees it Choose position & starting number No watermark, ever No subscription or account

Several page jobs to do? Organise PDF lets you reorder, rotate, delete, split, merge and number pages on one screen.

Your file is never uploaded — it’s processed right here in this browser tab, on your device. It never reaches a server, so we never see it, copy it or keep it.
At a glance

Add page numbers: quick facts

Stamp page numbers onto every page of a PDF, free and in your browser.

Updated

Price
Free. No sign-up, no watermark.
Options
Bottom centre, bottom right, top centre or top right; any start number; "1" or "Page 1 of N".
Style
Numbers are 10pt Helvetica in dark grey on every page, including the first.
Locked PDFs
Unlock a password-protected PDF first with Unlock PDF.
Privacy
Your file is processed in your browser and never uploaded.
How it works

How to add page numbers to a PDF

Pick where the numbers go, the number to start from, and whether to show plain numbers or Page 1 of N. They’re set in dark grey 10 pt Helvetica, about 1 cm in from the edge.

  1. 01

    Add your PDF

    Drop in the PDF you want numbered.

  2. 02

    Set position and format

    Choose where the numbers go, what page to start counting from, and the format.

  3. 03

    Save your PDF

    Get back the same document with clean page numbers stamped onto every page.

Tips

Tips for page numbers that look right

Page numbers are what people use to find their way round a document, so they’re worth getting right.

  • Number the final versionNumbers are stamped onto the pages themselves, so add them last, once pages have been added, removed and put in order. Deleting or moving a page afterwards leaves the numbering out of step.
  • Use Page 1 of N for printoutsWhen a document is printed and handed round, “Page 1 of N” shows at a glance whether a page has gone missing. For documents read on screen, plain numbers look tidier.
  • Keep clear of existing footersNumbers go about 1 cm from the edge. If your pages already have a footer or a logo there, put the numbers at the top instead, so the two don’t overlap.
  • Continuing another document?Set “Start at” to carry on the count. If part one ended on page 24, start part two at 25, and the two files read as one numbered set.

Like every Altto tool, this runs on your device — nothing you add is uploaded. How Altto works

10 pt

is the size the numbers are printed at, the same size Word uses for footnotes, so they’re easy to read without crowding the page.

FAQ

Frequently asked questions

What the page numbering tool can and can’t do. Want to trim the margins too? Do that first with Crop PDF.

Can I start numbering somewhere other than 1?
Yes — set “Start at” to whatever number you want the first page to show, useful if this PDF continues on from another document.
Where can the numbers go?
Bottom centre, bottom right, top centre, or top right — pick whichever matches how you print or file your documents.
Will this affect the rest of my document?
No. Only a small page number is added to each page — everything else stays exactly as it was.
Can I number a password-protected PDF?
Not directly — unlock it first with our Unlock PDF tool, then add numbers here.
Can I leave the cover page without a number?
Every page gets a number, including the first. To leave a cover unnumbered, split it off with Split PDF, number the other pages here starting at 1, then join the cover back on the front with Merge PDF.
Can I change the font, size or colour?
Not at the moment. The numbers are always 10 pt Helvetica in a dark grey that reads clearly on white paper without looking heavy. You can choose the position, the starting number and the format, which covers most documents.
Can I use Roman numerals or letters?
No, only ordinary numbers, either on their own or as Page 1 of N. Roman numerals such as i, ii, iii are usually only wanted for the front pages of a long report, and those are best numbered separately and joined on afterwards.