Add Watermark to PDF — Free Online Tool
Add a text watermark to every page of your PDF. Customize opacity, rotation, and position. 100% free and private.
Protect your PDF documents with visible watermark text. Add "CONFIDENTIAL", "DRAFT", company names, or copyright notices across every page. Customize the angle, opacity, and position to suit your needs.
Drop a PDF to add watermark
PDF files only
🔒100% Private — Your files never leave your device. All processing runs locally in your browser.
How It Works
Upload a PDF, type your watermark text, and configure opacity, size, rotation, and position. The tool loads your PDF using pdf-lib.js, then draws the watermark text on every page before saving the result.
Processing is 100% local — your PDF is never uploaded to any server. The watermark is embedded directly into the PDF structure, so it appears in all viewers and when printed.
Features
- ✓Custom text watermarks — CONFIDENTIAL, DRAFT, or any text
- ✓Adjustable opacity from 5% to 100%
- ✓Font size control from 12pt to 120pt
- ✓Rotation angle from -90° to 90°
- ✓Position presets: center, corners
- ✓Applies to all pages automatically
Frequently Asked Questions
Currently the tool supports text watermarks. Image/logo watermarks are on the roadmap.