PDF Watermark & Page Numbers

The PDF Watermark & Page Numbers tool stamps a diagonal or centered text watermark — like "CONFIDENTIAL", "DRAFT" or a company name — across every page of a PDF, and can add page numbers at the same time, all with control over opacity, size, rotation and position. It's the quick way to mark a document as a draft before circulating it for review, or brand an internal report without opening a full editing application. Whether you need to add watermark to pdf, want pdf page numbers in the footer, or simply need to stamp pdf online before sharing, this tool handles all of it in one pass.

Watermark text renders using a built-in PDF font (no font file needs to be uploaded or embedded separately) at whatever size, rotation angle and opacity you set — lower opacity keeps the underlying content fully readable through the stamp, which is the usual goal for a watermark rather than an obstruction. Page numbers, if enabled, sit independently in the footer at your chosen position (left, center or right) and can start counting from any number, useful when a document is one part of a larger multi-file set that needs continuous numbering.

Everything is written directly onto each page's content using the pdf-lib library, running entirely in your browser, so the source PDF never leaves your device even if it contains sensitive material — which is often exactly the kind of document you'd want a "DRAFT" or "CONFIDENTIAL" stamp on in the first place.