Add Watermarks to PDF
Stamps text or image watermarks onto PDF pages.
How it Works
- Select the target PDF file.
- Type your watermark text (e.g., "CONFIDENTIAL") or upload a logo image.
- Set size, rotation, transparency, and page scopes.
- Export the watermarked output file.
Core Benefits
- Real-time styling previews
- High-performance canvas-based rendering
- Supports text overlays and custom PNG images
Why Choose Client-Side Processing?
Protect your intellectual property or label documents with drafts, logos, and confidentiality stamps. Customize font size, rotation, opacity, and positioning locally.
Instead of standard web servers converting, rewriting, or holding files in cache, TellPDF mounts WASM binaries directly in your browser. All memory registers are local and vanish once you reload the page.