Add Page Numbers to a PDF

No. The numbering runs entirely in your browser with pdf-lib, and the file is only read into memory. Nothing is uploaded, so confidential documents stay on your device.

There are six anchor positions: bottom center, bottom left, bottom right, top center, top left, and top right. Each sits 28 points in from the page edge, and you pick one with the Position buttons before downloading.

Yes. Set the Starting number to any whole number of at least 1 and the first page shows that value, with each later page counting up by one. Decimals are rounded down and anything below 1 snaps back to 1.

Numbers are drawn in the standard Helvetica font in a dark gray. Font size ranges from 6 to 72 points, defaulting to 12; values outside that range are clamped to the nearest limit.

The tool inserts a -numbered suffix before the extension, so report.pdf downloads as report-numbered.pdf. Your original file is never modified in place.

No. The existing text, images, and layout are left untouched. The tool only draws one small number per page in the margin, on top of the page content.

Yes. The number is placed in PDF page space rather than at a clicked screen point, so it lands in the right corner even on rotated or landscape pages. Every page in the document is numbered.

Not directly. It stamps a plain sequential number on every page from your chosen start value, without prefixes, suffixes, or skipped pages. For Bates numbering or a cover-page exception, split the PDF first or use a dedicated Bates tool.

A PDF that opens without a password in your viewer will number here. Files that require a password to open cannot be read, and the tool shows a short error instead.