Watermark PDF
Add custom text or transparent image watermarks to your PDF pages. Protect intellectual property, label drafts, or brand documents with adjustable opacity and placement.
Your files never leave your device. All processing happens locally in your browser with no file uploads or account required.
How to use watermark pdf
- 01
Select PDF document
Choose the PDF file you want to watermark.
- 02
Design watermark
Type custom text or upload a logo, then adjust position, rotation, scale, and opacity live on the page.
- 03
Save watermarked PDF
Apply the watermark to one page or all pages and download your marked document.
Important details & limitations
Place text or a transparent image watermark directly on the page. Drag, resize, change opacity and rotation, and apply to one or all pages. Watermarks are visual labels, not security.
Frequently asked questions
What should I know before using watermark pdf?+
Place text or a transparent image watermark directly on the page. Drag, resize, change opacity and rotation, and apply to one or all pages. Watermarks are visual labels, not security.
Where are my files processed?+
All document contents remain on your device. Browser JavaScript and WebAssembly perform the work; no files are sent to a conversion service.
What files does watermark pdf support?+
Use unencrypted PDFs; Unlock PDF can first remove encryption using a known password. Up to 100 MB total. Malformed, unusually large, or complex PDFs may exceed browser limits. Editing a signed PDF changes the document and can invalidate its signature.