Add diagonal or horizontal text watermarks across document pages with custom opacity so text beneath remains readable.
Watermarking documents with notices like 'CONFIDENTIAL', 'DRAFT', or 'SAMPLE' prevents unauthorized sharing and clarifies document status during review cycles. Setting the right transparency ensures the notice is prominent without blocking the text underneath.
Worked example: Stamp a diagonal semi-transparent 'DRAFT - NOT FOR DISTRIBUTION' watermark
Input
A draft client proposal undergoing internal team review.
Expected result
Every page displays a bold diagonal 'DRAFT' label across the center, with proposal text clearly visible beneath it.
A 20% opacity setting keeps the watermark visible while allowing reviewers to read every line of text without eye strain.
Before you use the result
- Keep watermark opacity between 15% and 25% for maximum readability.
- Check that diagonal watermarks don't obscure signatures or invoice totals.
- Remove the watermark when generating the final approved version.
If the result is not what you expected
The watermark is too dark and blocks the text.
Lower the opacity slider. A subtle watermark protects the document just as effectively without interfering with reading.
Step-by-Step Walkthrough
Upload PDF
Select your PDF document.
Customize Watermark
Choose a preset label or type custom text, then adjust angle, color, and opacity.
Stamp & Download
Click Stamp Watermark to download your protected document.
Key Capabilities & Features
Standard watermark presets including CONFIDENTIAL, DRAFT, DO NOT COPY, and SAMPLE
Custom text input for company names, review notices, and author credits
Customizable rotation angles (45°, 0°, -45°) and color options
Opacity slider to ensure underlying text remains readable
Frequently Asked Questions
Ready to try PDF Watermark Stamper?
Open PDF Watermark Stamper and try the example from this guide. Check the tool page for supported formats, limits, and access requirements.