Stamp text like "CONFIDENTIAL", "DRAFT" or your company name diagonally across every page. Control color, size, opacity and angle. In-browser only — no upload.
Watermarking is the standard way to mark a document as a draft, confidential, or property of a company before sharing it. This tool stamps your chosen text diagonally across every page at the opacity and angle you set.
Using pdf-lib, the tool draws rotated, semi-transparent text on top of each existing page — all inside your browser. No upload means this is safe even for legal drafts you don't want touching a third-party server before they're finalized.
Choose your PDF, type your watermark text (like CONFIDENTIAL or DRAFT), adjust color, size, opacity and angle, then click Add Watermark. Every page gets the stamp; the file downloads instantly.
Yes — the opacity slider controls exactly how faint the watermark appears. Most people use 15-30% opacity so the underlying text remains easy to read.
Currently the watermark applies to every page, which is the standard behavior for marking drafts or confidential documents throughout.
It is a real layer added to the page and requires PDF editing software to remove — casual viewing and printing show it normally, same as watermarks from paid PDF tools.
No. The watermark is drawn directly onto your PDF in the browser. Nothing is sent to a server.