Add page numbers to a PDF

The sideways page problem

A PDF page stores its contents in one orientation and carries a separate flag — /Rotate — saying how a reader should turn it before showing it. This is not unusual. Every sideways scan has one, as does anything that has been through a rotate tool, and multifunction printers produce them constantly.

The consequence is that "the bottom right of the page" means two different things: the bottom right of the stored coordinates, and the bottom right of what you are looking at. A tool that writes into the first one produces a number running sideways up the left edge, or past the boundary and invisible. It looks perfect on every ordinary document and fails the moment somebody numbers a scan.

Here the corner you choose is the corner you see. The rotation is read, the position converted, and the text itself turned so it reads level once the page is displayed.

Counting, and the mistake worth avoiding

If you leave the title page bare on a twelve-page document, the last page should read "Page 11 of 11" — not "Page 11 of 12". The total counts pages that carry a number, because that is what a reader checking they have the whole document will count.

Starting from a number other than 1 works the same way. A section that begins at page 47 and runs for six pages ends at 52, and the totals follow. This is the case that matters for court bundles and tender submissions, where the pagination has to line up with an index somebody else wrote.

Text, not a picture

The numbers are drawn into the page's content stream using an embedded standard font, which means they are selectable, searchable, and sharp at any zoom. Nothing is rasterised and no existing page is redrawn, so text that was already there stays exactly as it was and images keep their original compression.

The document does grow very slightly — a few hundred bytes for the font reference and the drawing commands. Nothing that would trouble an email attachment limit.

What this cannot do

It cannot move your existing content out of the way. A PDF is a fixed layout with no flow, so a number placed in a corner that already has a footer will sit on top of it. Pick another corner, or add a margin before you export the document in the first place.

It also cannot renumber a document that already has numbers printed on it — those are part of the page, and removing them means destroying that area of the page rather than editing it.

Questions

How do I add page numbers to a PDF?

Drop the document in, choose a corner and a style, and download it. The numbers are drawn onto the pages as real text, so they stay selectable and searchable rather than arriving as a picture stuck on top.

Can I leave the title page unnumbered?

Yes — tick the box and the first page is left bare. The numbering then starts at 1 on the second page, and a "Page 1 of 12" style total counts only the pages that actually carry a number. Getting that wrong is the giveaway that a tool counted the file rather than the numbering.

Can I start from a number other than 1?

Yes. That is what you want when a document is one part of a larger bundle — a court exhibit, a chapter, a section of a tender — and the pagination has to continue from what came before.

What happens on pages that are sideways?

They are numbered the right way up. A PDF page carries a flag saying how it should be displayed, and scanned documents use it constantly. Tools that ignore it draw the number into the stored coordinates instead of the visible ones, which puts it sideways up an edge or off the page entirely. Here the position you pick is the position you see.

Will it cover up my content?

It can, if your document already has something in that corner — the numbers are drawn on top rather than reflowing the page, because a PDF has no flow to reflow. Pick a different corner if it clashes. Nothing is removed, so trying again with the original costs nothing.

Is my document uploaded?

No. The paperwork that needs numbering is contracts, court bundles, tenders and reports — documents whose whole point is that they are confidential until filed. This one is read and rewritten in your browser, and no request carries it.

What BriskFile will not do to you

• Your files never leave your device

  Every conversion runs in your browser. Open DevTools, watch the Network tab, and you will see no upload — because there is not one.

• No account, no email, no watermark

  Nothing to sign up for and nothing stamped on your images. There is no step between choosing a file and getting it back.

• No limits at the download button

  No daily cap, no file counter, no "upgrade to download". If the tool starts a job, it finishes it.

• Checkable, not just claimed

  Open the Network tab and convert something — nothing goes out. Or load the page, disconnect, and watch it keep working: the tool is already on your machine, and your file never leaves it.