Add Watermark to PDF
Stamp text like CONFIDENTIAL, DRAFT or your name across your PDF. Choose the size, angle, color and transparency and preview the result.
How to add a watermark to a PDF
- Choose a PDF and type your watermark text, or tap a preset like Confidential or Draft.
- Adjust size, color, opacity and rotation. Choose one centered mark or a repeating pattern, and optionally limit it to certain pages.
- Click Add watermark and download the stamped PDF.
Features
Fully adjustable
Size, color, opacity, rotation and font.
Single or tiled
One big stamp, or a repeating pattern across each page.
Live preview
See the watermark on your own page before saving.
Private
Your PDF is processed on your device and never uploaded.
Frequently asked questions
Can the watermark be removed later?
The watermark is drawn into each page’s content, so it cannot be toggled off in a viewer. Keep your original file if you may need an unmarked copy.
Which characters are supported?
The watermark uses the PDF standard fonts, which support Latin letters, digits and common punctuation. Non-Latin scripts such as Chinese or Cyrillic cannot be drawn.
What is a good opacity?
15–30% keeps text readable underneath while still being clearly visible. Increase it for stronger deterrence.
Is my PDF uploaded?
No. The watermark is added in your browser with pdf-lib and the file never leaves your device.