Editor
PDF Watermark — Stamp Text on PDFs Locally100% Private and Secure
- Watermark
- Mobile Friendly
- Accessibility Tested
- SEO Optimized
- Fast Loading
- Responsive
Version 1.0.0 · Last reviewed
How it worksShow guide
Introduction
Add center, diagonal, tiled, or footer watermarks to PDFs with pdf-lib. Files stay on your device.
Step-by-step
- Choose a PDF
- Enter watermark text and a placement preset
- Apply and download
Worked example
A 3-page proposal gets a diagonal “CONFIDENTIAL” watermark on every page.
Use cases
- Mark drafts as confidential
- Brand client deliverables
- Discourage unauthorized redistribution
Frequently asked questions
Are PDFs uploaded?
No. Watermarking runs locally with pdf-lib.
Does this work on encrypted PDFs?
Password-protected PDFs may fail. Remove encryption first if your PDF refuses to open.
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