Add Watermark to PDF
Protect sensitive documents. Add 'CONFIDENTIAL', 'DRAFT', or custom copyright stamps across every page of your PDF file with custom rotation, opacity, and typography.
Upload PDF to Add Watermark
Stamp customizable text or logo stamps anywhere on your document (Corners, Center, Margins, Repeat Tile) with live preview.
Step-by-Step Instructions
Upload PDF File
Select or drop your multi-page PDF document into the PDF watermarking tool.
Configure Watermark Text or Logo
Type custom watermark text (e.g. 'CONFIDENTIAL', 'DRAFT', 'COPY') or upload your transparent company logo.
Adjust Position, Angle & Opacity
Place the watermark in the center, across corners, or tile it diagonally across every page with custom opacity and rotation.
Download Protected PDF
Export your watermarked PDF document with vector-embedded watermark layers across all selected pages.
Key Features & Capabilities
- Dual watermark modes: custom text watermark (with custom font, color, and size) or transparent PNG/SVG logo overlay
- Diagonal 45° angle repeating tile pattern protecting against unauthorized distribution and screenshot theft
- Granular page targeting: apply watermark to all pages, odd pages, even pages, or specific custom page ranges
- Layering controls: position watermark over page content (foreground) or behind page content (background watermark)
- Preserves original PDF text searchability, vector artwork, and bookmarks intact
- 100% confidential in-browser watermarking: sensitive legal briefs and financial forecasts are never uploaded
Frequently Asked Questions
Why should I add watermarks to sensitive business PDFs?
Adding visible watermarks (such as 'CONFIDENTIAL', 'SAMPLE', or 'INTERNAL USE ONLY') prevents unauthorized sharing, deters leaks of proprietary documents, and clearly marks unfinalized drafts during legal or client review.
Can I place the watermark behind the text so it doesn't obscure readability?
Yes. You can select the 'Background Watermark' layer option. This renders the watermark underneath the page text and images while maintaining a subtle opacity (e.g. 15-25%) so the document remains easy to read.
Does adding a watermark flatten or rasterize the PDF pages?
No. The tool injects the watermark as a native PDF content stream operator (`/GS` graphics state for transparency) using `pdf-lib`. The document's original vector text layers, hyperlinks, and form fields remain 100% searchable and crisp.
Are my uploaded confidential documents safe?
Yes. All watermarking operations execute locally in your web browser. No document files or text are transmitted to remote servers.
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