Tool
Add Watermark Online Free
Add a text watermark to every page of your PDF. No sign up required.
Choose PDF file
Your file stays in your browser — nothing is uploaded
How to add watermark
Step 1
Upload your PDF file.
Step 2
Enter your watermark text, choose opacity and position.
Step 3
Click 'Add Watermark' to apply it to your pages.
Layered Stream Compositing and Opacity Control
Adding watermarks overlays transparent text or raster image layers across the PDF page tree index. By calculating exact rotational geometry and alpha transparency locally, watermarks are embedded permanently into content streams without altering underlying text.
Key Use Cases
- Stamping "CONFIDENTIAL" or "DRAFT" notices across pre-release business reports
- Branding client proposals and sample deliverables with corporate logo overlays
- Applying copyright protection notices across intellectual property documents
Privacy & Security Guarantee
Because this utility executes entirely within your web browser's local sandbox, your sensitive files are never uploaded to cloud servers, stored in temporary directories, or inspected by third-party logs. This ensures complete data confidentiality and compliance with privacy standards.
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