Add page numbers

Wherever you point at: top or bottom, then left, centre or right. The margin setting is the gap to the nearest edges, 24 points by default. A centred number is placed by measuring the text width, so it sits on the middle of the sheet whatever the label says.

Yes. The start setting is the number given to the first page, and every page after it counts up by one. It accepts any whole number, including zero and negatives, and rejects anything else with "start must be a whole number". Turn on the cover option and the first sheet is left bare, with the count starting on page two.

Neither. pdf-lib loads your file, draws the numbers and saves it again, all inside a Web Worker in this tab. No request goes out while it runs, and there is nothing to sign in to. The file you download was built on your own machine from the bytes you dropped in.

Yes. Drop as many PDFs as you like and each is handled separately, coming back as its own file with a -numbered suffix. Each file restarts at your start value rather than continuing across the batch. If you want one run of numbers spanning several documents, use Bates numbering instead.

The number is drawn over it. Nothing is erased, no white box is painted behind the text, and no space is added to the page, so a footer already sitting where you put the number will collide. Move the number to another corner, or raise the margin, and the preview shows the result before you run it. Check the first page of the result before you run a long document.

This one paints ink onto the page, so the numbers are part of the printed document. Page labels change the label your reader shows in its page box and thumbnails, and draw nothing at all. Use this for something you are printing and page labels for something you read on screen.