Watermark PDF with Live Preview
Drag and resize your watermark directly on the document preview. Adjust opacity, scale, and angle in real time. 100% private.
Select PDF file
Choose a PDF to launch the visual watermark editor
How to Add Custom Watermarks to PDF Pages
Protect your intellectual property by applying customizable text stamps like CONFIDENTIAL, DRAFT, or your company brand across all pages.
1. Select PDF File
Open the PDF document you want to stamp with custom copyright or security marks.
2. Customize Stamp
Type your watermark text, choose font size, adjust color, opacity, and angle (diagonal 45° or horizontal).
3. Apply & Download
Stamp the watermark across every page and download your secured document instantly.
Frequently Asked Questions
Everything you need to know about security, formatting standards, and zero server upload privacy.
01. Can I customize the opacity and rotation of the watermark? ▼
Yes! You can adjust transparency from subtle 15% opacity to solid 100%, and choose between 45° diagonal or horizontal placement.
02. Does watermarking increase the file size significantly? ▼
No. Because vector text stamps are inserted into the PDF document tree, the file size increase is virtually negligible.
03. Are my confidential documents uploaded to any server? ▼
No. The watermarking engine runs 100% locally in your browser with zero network transmission.
04. Can the watermark be applied to all pages automatically? ▼
Yes, the engine stamps every page of your document uniformly with consistent position and formatting.
05. Is this watermark tool free to use without limitations? ▼
Yes, 100% free with unlimited document processing and no account required.