Add custom text or image watermarks to PDF documents instantly with our secure, browser-based watermarking tool.
Professional watermarking with full control over opacity, position, rotation, and appearance. Complete privacy protection.
Perfect for copyrighting documents, adding confidentiality marks, or branding PDF files before distribution.
Drag & drop a PDF file here, or click to select file
Single file only • PDF format only
Upload your PDF file by dragging and dropping it or clicking the upload button. Supports all standard PDF formats.
Choose watermark type - either text watermarks or custom image watermarks from your device.
Customize watermark appearance including opacity (10-100%), rotation angle, font size, text color, and positioning.
Select placement strategy: center positioning, corner placement, or diagonal tiling for comprehensive coverage.
Click apply watermark to process your PDF. Download the watermarked document instantly with full protection.
Add copyright watermarks to legal documents, contracts, and intellectual property before sharing with clients
Apply 'CONFIDENTIAL' watermarks to sensitive business documents, financial reports, and internal communications
Add company logos and brand images to presentations, marketing materials, and corporate documents for brand consistency
Mark documents as 'DRAFT' or 'SAMPLE' during review phases to prevent premature distribution
Add attorney-client privilege watermarks, 'CONFIDENTIAL' stamps, or copyright notices to legal documents and contracts
Apply company logos, brand watermarks, or trademark notices to business documents, presentations, and marketing materials
Mark sensitive documents, financial reports, or proprietary information with confidentiality watermarks before distribution
Add draft watermarks, institution logos, or copyright notices to academic papers, research documents, and theses
Watermark e-books, digital guides, manuals, or digital content before distribution to protect intellectual property
PDF watermarking is the process of overlaying text or images onto PDF document pages without altering the original content. This technique is widely used for copyright protection, document security, branding, and indicating document status (draft, confidential, etc.).
Our watermarking tool uses sophisticated JavaScript libraries to process PDF files directly in your browser. When you upload a PDF, the system analyzes each page and overlays your chosen watermark at precise coordinates. For text watermarks, you can customize font, size, color, and rotation. For image watermarks, the tool supports PNG files with transparency for clean blending.
The watermarking process includes intelligent opacity control, anti-aliasing for smooth edges, and proper layering to ensure watermarks are visible but don't interfere with document readability. You can choose between centered placement for logos, corner positioning for notices, or diagonal tiling for comprehensive page coverage. All processing occurs locally using advanced web technologies, ensuring your documents never leave your device for maximum privacy and security.
Using watermarks with very high opacity
Keep watermark opacity between 20-50% for visibility without obscuring document content. Higher opacity makes documents difficult to read.
Placing watermarks over important text or data
Position watermarks in corners or areas that don't interfere with critical document content. Use diagonal tiling for full-page coverage when appropriate.
Using low-resolution images for watermarks
Use high-resolution PNG images (300 DPI or higher) with transparency for professional-looking watermarks that scale well.
Not testing watermark appearance before applying
Preview your watermark settings with different opacity and positioning options to ensure the desired effect before processing the entire document.
Watermarking very large PDF files without optimization
For documents over 50MB, consider splitting into smaller files or reducing resolution to improve processing speed and browser performance.
Absolutely! All PDF watermarking happens directly in your browser using JavaScript. Your files are never uploaded to our servers, stored anywhere, or shared with third parties.
We support both text watermarks (custom text with adjustable font, size, color, rotation) and image watermarks (PNG, JPG, and other image formats with transparency support).
Yes! You have full control over opacity (10-100%), rotation angle, font size, color, and positioning. Choose from center, corners, or diagonal tiling patterns.
Our watermarking process preserves the original document quality and resolution. Watermarks are overlaid without compressing or altering the underlying content.
Yes, you can upload password-protected PDFs, but you'll need to enter the password to unlock the document before watermarking can be applied.
We support PNG (recommended for transparency), JPG, JPEG, GIF, BMP, and WebP formats. PNG with transparency provides the best results for clean watermarking.
There's no strict file size limit, but very large PDFs with many pages may take longer to process. For optimal performance, files under 100MB are recommended.
Once watermarks are applied and the PDF is saved, they become part of the document content. This ensures permanent protection but means watermarks cannot be easily removed.