About the Add Watermark to PDF
Mark drafts, confidential documents or sample copies with a clear text watermark on every page. Adjust font size, opacity, color and angle, and choose a single centred stamp or a tiled pattern across the page.
Your PDF is processed in your browser with pdf-lib and never uploaded.
How to use it
- Open a PDF.
- Type the watermark text and adjust its style.
- Download the watermarked document.
Good to know
- The watermark uses the built-in Helvetica font, which supports Latin characters. Other scripts are replaced with “?” and you will be warned.
- A text watermark can be removed by someone with PDF editing tools; it is a deterrent, not protection.