Add Watermark to PDF
Stamp text or a logo across your PDF pages.
How to use the Add Watermark to PDF
- 1 Upload your PDF.
- 2 Choose a text or image watermark and set position, size, color and opacity.
- 3 Apply to all pages or a range, then download the watermarked PDF.
Examples
- ▸ Stamping "CONFIDENTIAL" diagonally across a draft contract.
- ▸ Tiling a © copyright notice over every page of a report.
- ▸ Adding a company logo watermark to an invoice template.
Frequently asked questions
Can I watermark only some pages?
Yes. Turn off "apply to all pages" and enter a page range like "1-3, 5" to watermark only those pages.
Can I use my logo as the watermark instead of text?
Yes. Switch to image mode and upload a PNG or JPG — a PNG with a transparent background works best combined with the opacity slider.
Can the watermark be removed afterward?
A semi-transparent, tiled or diagonal watermark is much harder to remove than a small corner mark, but no watermark on an editable PDF is completely unremovable. It is meant to deter casual reuse and mark ownership, not to encrypt the file.
Are my PDFs uploaded to a server?
No. The watermark is applied entirely in your browser with pdf-lib, so your document never leaves your device.