Stamp a text watermark across every page of a PDF — control size, opacity, rotation, and position — then download instantly.
Max 20MB
Yes, the watermark text is stamped on every page of your PDF, centered and rotated according to your settings.
The watermark is permanently embedded into the PDF content. Keep your original file if you need an unwatermarked version later.
No, watermarking happens locally in your browser using pdf-lib — your file is never uploaded anywhere.
This tool stamps a custom text watermark — like "CONFIDENTIAL," "DRAFT," or a company name — across every page of a PDF document, directly in your browser. Control the text, size, color, opacity, and rotation angle to match your needs, then download the watermarked file instantly.
A diagonal watermark (around 45°) at moderate opacity (20–40%) is the classic, professional-looking style — visible enough to serve its purpose without making the underlying document hard to read. Higher opacity and a horizontal orientation make the watermark more prominent and harder to ignore, useful when the watermark itself is the primary message (like a large "SAMPLE" stamp on a preview document).
Using the pdf-lib library, this tool loads your PDF, and for every page, draws the watermark text at the specified size, color, opacity, and rotation, centered on the page. The result is a new PDF file with the watermark permanently embedded as part of the page content — not just a visual overlay — so it stays in place regardless of what PDF viewer is used to open the file afterward.
All watermarking happens locally in your browser using pdf-lib — your PDF is never uploaded to a server, keeping confidential documents completely private during processing.