Add Watermark to PDF
Protect your PDF documents by drawing semi-transparent text or logo image watermarks. All processing runs 100% locally in your browser to safeguard your privacy.
Drag and drop your PDF file here, or click to browse
Supports PDF files up to 50MBAbout Add Watermark to PDF Tool
Watermarking is a widely used document security practice that places a semi-transparent text or image overlay on top of existing PDF pages. This serves as visual security, marking drafts, showing confidentiality settings, or branding files before they are shared publicly.
Key Customization Options:
- Text & Image Watermarks: Design custom text layouts with full font family and style styling, or upload your logo/signature image for transparent overlays.
- Flexible Placement & Tiling: Draw the stamp in any corner, center it, or switch on repeating grid patterns (tiling) to cover the entire canvas.
- Opacity & Rotation Sliders: Precise adjustment for watermark transparencies and rotating angles so it reads clearly over your page contents.
- Page Range Rules: Target covers (first page only), specific pages, or apply universally across the document.
Absolute privacy:
Most online PDF watermarking web applications require you to upload your files to external cloud servers. This exposes confidential contracts, bank logs, or proprietary designs to data leak risks. Zylio runs fully client-side. Your files are processed inside your browser and never leave your computer.