Stamp PDF — Add a Stamp to Any PDF
Add a CONFIDENTIAL, DRAFT, or custom text stamp to every page of your PDF. Customize font, opacity, and position. Free, private, 100% browser-based.
Add a text stamp to your PDF pages for branding, confidentiality notices, or draft markings. Position the watermark text anywhere on the page with customizable font size and opacity — all processed locally in your browser.
Drop a PDF to add watermark
PDF files only
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