VeluraPrime Watermark PDF lets you stamp custom text (like "CONFIDENTIAL", "DRAFT", or "SAMPLE") or company logos across all pages of your PDF directly in your browser. Customize opacity, angle, font size, and placement to protect intellectual property with 100% client-side privacy.
What Is Watermark PDF?
Watermark PDF is a security and branding utility that stamps semi-transparent vector text or raster image logos over or under existing PDF page content.
How to Use Watermark PDF Online
Follow these simple steps to process your files securely in your web browser.
Upload PDF
Select or drag your PDF document into the workspace.
Configure Watermark
Type your custom watermark text or upload a logo, adjusting font size, angle, and opacity.
Stamp & Download
Click "Watermark PDF" to permanently embed the watermark across all pages.
How Watermark PDF Works Under the Hood
The tool calculates transformed transformation matrices and stamps semi-transparent text or image XObjects directly into the content stream of every page using pdf-lib in browser RAM.
When Should You Use Watermark PDF?
Watermarking is essential for branding and confidential document handling:
Marking Drafts and Review Copies
Stamp "DRAFT - NOT FOR DISTRIBUTION" on preliminary contracts and proposals.
Protecting Proprietary Research
Apply copyright notices and company branding across whitepapers and training manuals.
Privacy and File Processing
All watermark rendering and stream embedding occur within your local browser. Your documents and proprietary logos remain 100% private.
Common Problems and Solutions
Quick fixes for common file handling and formatting questions.
Watermark obscures underlying text
Lower the opacity slider to 15%–25% so that the watermark is visible without hindering readability.
Frequently Asked Questions About Watermark PDF
Can the watermark be easily removed by recipients?
The watermark is embedded directly into the page content stream. For added protection, encrypt the file using Protect PDF.