How to Use PDF Watermark
- Step 1: Upload your PDF document.
- Step 2: Choose Text Watermark (enter text like CONFIDENTIAL, DRAFT, COPY) or Image Watermark (upload logo PNG/JPG).
- Step 3: Adjust font size, color, rotation angle (e.g. 45° diagonal), opacity, and position.
- Step 4: Select target pages (All pages, Odd, Even, or Custom range) and download your watermarked PDF.
Settings & Controls Explained
One Resizer's PDF Watermark provides specialized browser-local controls tailored to its workflow:
- Text Watermark Controls: Custom text string, font selection, font size, hex color picker, and rotation angle (-90° to +90°).
- Image Logo Watermark: Upload company logo images with scaling and transparency adjustments.
- Opacity Slider (0.1 to 1.0): Control watermark transparency to keep underlying document text legible.
- Page Range Filter: Apply watermarks across all pages or target specific page numbers.
Supported Formats & Technical Capabilities
| Specification | Technical Capability |
|---|---|
| Accepted Input Formats | PDF (.pdf) |
| Output File Formats | Watermarked PDF (.pdf) |
| Processing Engine | PDF-Lib drawText & drawImage |
| Network Privacy | Local browser processing (0 bytes uploaded) |
Best Practices & Key Recommendations
- Set opacity between 0.15 and 0.25 so the watermark remains clearly visible without obscuring underlying document text.
- Use a 45-degree diagonal angle across the page center for standard legal or confidential draft markings.
Troubleshooting & Common Issues
- Watermark covers document text too heavily: Lower the opacity slider to 0.2 or 0.15 for a lighter semi-transparent stamp.
- Pre-existing watermarks cannot be edited: Watermarks added to PDF content streams become part of the page layer; this tool stamps new watermarks onto documents.