Watermark PDF Documents
Stamp customizable text or company logos across all pages. Protect confidential drafts, contracts, and proposals with 100% in-browser privacy.
Drop your PDF here or browse
Stamp text or image watermarks with custom opacity, rotation, and colors 100% locally
How to Watermark PDF Files in 3 Simple Steps
Select Document
Drop your PDF file into the dropzone. The document is safely loaded into local browser memory.
Customize Watermark
Type text (like “CONFIDENTIAL”) or upload a logo. Choose opacity, rotation, color, and positioning.
Stamp & Download
Click “Add Watermark”. Your protected PDF is compiled in memory and ready for immediate download.
Frequently Asked Questions
Common questions about adding watermarks to PDF files with PDFPulse.
How do I add a watermark to a PDF document?▾
Select your PDF file, choose whether to stamp custom text (like 'CONFIDENTIAL' or 'DRAFT') or upload an image logo, adjust opacity and rotation, and click 'Add Watermark'. Your protected document compiles locally in memory for immediate download.
Can I use a company logo or image as a watermark?▾
Yes. Switch to the 'Image / Logo' tab in the tool and choose any transparent PNG or JPEG image. PDFPulse scales and positions your logo seamlessly across all pages.
Can I customize the watermark transparency and angle?▾
Yes. You can adjust the opacity slider from 5% (subtle background mark) to 100% (solid stamp), and select preset rotation angles such as 45° diagonal, 0° horizontal, or 90° vertical.
Are my confidential files uploaded to any server?▾
Never. PDFPulse operates 100% client-side inside your browser tab using WebAssembly. Your files are processed entirely in local RAM and never leave your computer or phone.
100% Private
Your PDF is processed locally on your device. Zero bytes leave your browser.
Instant Processing
Stamp dozens of pages in milliseconds without waiting on network uploads.
Unlimited & Free
No sign-up, no hidden fees, and zero artificial limits.