Add Watermark to PDF Free
Add watermark to PDF free online. Stamp DRAFT or CONFIDENTIAL text on every page — browser-based, no file upload.
Protect drafts, mark confidential documents, or brand files with a repeating watermark. Applied uniformly to all pages in one step.
How to use
- Upload your PDF and open the Watermark tool.
- Enter your watermark text.
- Preview the placement on the page.
- Apply and download your watermarked PDF.
Frequently asked questions
Is my PDF uploaded to a server?
No. All processing happens locally in your browser. Your files never leave your device.
Is aismartpdf.com completely free?
Yes. Every tool is 100% free with no ads, no paywall, and no account required. There are no hidden fees or premium upgrades.
Can I change the watermark angle or opacity?
The tool applies a standard diagonal watermark. Custom styling options may be added in future updates.