Add Watermark to PDF Online for Free
Protect your intellectual property, study notes, question papers, and official drafts by overlaying custom text watermarks across your PDF pages. Configure text, opacity, font size, and diagonal rotation to safeguard your work against unauthorized distribution.
Upload your files or drag them here to start processing instantly in your browser.
How to Use Add Watermark
- Upload Document: Select the PDF document you wish to watermark.
- Enter Watermark Text: Type your custom watermark text (e.g., "CONFIDENTIAL", "DRAFT", or your institute name).
- Adjust Styling: Set your preferred font size, transparency opacity, and diagonal rotation.
- Download Watermarked PDF: Download the protected document with embedded watermarks.
Key Features & Benefits
Brand & Protect Content
Clearly mark proprietary lecture notes, sample test papers, and drafts.
Customizable Transparency
Ensure watermarks remain visible while keeping underlying text readable.
Fast Client-Side Overlay
Watermarks entire multi-page documents in seconds inside your browser.
No Watermark Tool Branding
We never add our own logo or advertising watermarks to your documents.
Privacy & File Limits
Client-Side Privacy: Your PDF documents are watermarked locally in your browser memory. Files are never transmitted or stored on external servers.
Usage Limits: Tested on desktop with files up to 50 MB and 150 pages. Watermarks are applied across all pages using vector text.
Frequently Asked Questions
Can I adjust the transparency of the watermark?
Yes, you can adjust the opacity slider so that the watermark is visible without obscuring the reading text.
Can I rotate the watermark diagonally across the page?
Yes, standard diagonal 45-degree rotation or horizontal positioning is supported.
Will the watermark be permanent?
The watermark is rendered directly into the PDF content stream, ensuring it displays in all viewers and printouts.
Can I add a watermark to specific pages only?
By default watermarks apply across all document pages to ensure thorough copyright protection.
Are my files safe during watermarking?
Yes. Processing is 100% client-side; no document content is ever sent to our servers.
Does watermarking increase the file size significantly?
No. Vector text watermarks add only a few kilobytes of metadata to the overall document.