Add Watermark
Protect drafts and confidential files with custom watermarks. Configure opacity, diagonal rotation, typography, color, scale, and target page ranges.
Add Watermark
Protect drafts and confidential files with custom watermarks. Configure opacity, diagonal rotation, typography, color, scale, and target page ranges.
How to Use Add Watermark
- Step 1: Upload PDF
- Step 2: Configure watermark text/image, angle, and opacity
- Step 3: Preview on target pages and export
Technical Specifications & Limitations
- Maximum file size: 50 MB.
- Supports text stamps (e.g., 'CONFIDENTIAL', 'DRAFT') and transparent PNG image watermarks.
- Configurable opacity from 10% to 100%.
Troubleshooting Common Issues
⚠Watermark covers up important document text.
Lower the opacity slider to 15%–25% so underlying text remains readable through the watermark.
⚠Watermark is only needed on the first page.
Use the page range selector to target specific pages or skip cover pages.
🔒Privacy & Security Guarantee
All PDF processing for Add Watermark occurs 100% inside your local web browser sandbox using WebAssembly and client-side JavaScript. Your documents, images, and data are never transmitted over the internet or saved to external servers. Full confidentiality is preserved for sensitive scientific research, financial records, and legal contracts.
Frequently Asked Questions
Can someone easily remove this watermark?
The watermark is stamped into the PDF's vector stream. Flattening or converting to high-res images makes it permanent.
Can I use our company logo as a watermark?
Yes, upload your logo as a PNG with transparency and adjust scale and opacity.
Related PDF Tools
View All 24 Tools →PDF Overlay
Merge a letterhead, stamp, or template PDF on top of another base document.
Add Page Numbers
Insert formatted page numbers with customizable position, font, and style.
Protect PDF
Encrypt PDF with a password to restrict unauthorized opening and viewing.
Edit PDF
Add text, geometric shapes, highlights, and annotations directly onto PDF pages.