Add Watermark to PDF
Add semi-transparent diagonal text watermarks to all or selected pages of PDF documents locally in your browser.
This tool runs in your browser.
0 files 0 total pages
Watermark preview
PDF files stay in this browser and are not uploaded.
Choose a PDF to begin.
How to use
- 01Choose one or more PDF documents from your computer or phone.
- 02Enter watermark text and customize font size, opacity, and page ranges.
- 03Stamp watermarks onto the PDF and download the protected document instantly.
FAQ
Does adding a watermark corrupt existing text, vector shapes, or layouts?
No. The tool overlays an independent semi-transparent PDF content stream layer, leaving all original fonts, vectors, and page structures intact.
Can I stamp watermarks on specific pages only (like cover pages)?
Yes. Enter page numbers or ranges (e.g. 1-3 or 5,8) in the page field to apply the watermark exclusively to those designated pages.
Are confidential business or contract PDFs uploaded to a remote server?
No. All PDF parsing and stamping happen entirely inside your local browser memory using WebAssembly. Your files are never transmitted online.