Add Watermark to PDF — Free Online
Add a text watermark (like “CONFIDENTIAL” or “DRAFT”) diagonally across every page of your PDF with this free online watermark tool. It runs in your browser — your file is never uploaded.
Click to choose a PDF or drop it here
How to use Add Watermark
- Select or drop a PDF file.
- Type your watermark text.
- Download the watermarked PDF.
Why use this free Add Watermark tool?
- 100% free — no sign-up, no watermark and no hidden limits.
- Completely private — your files are processed in your browser and never uploaded, so even confidential documents stay on your device.
- Instant & offline-capable — there’s no waiting for uploads or servers; it works even with a weak connection.
- Works on any device — runs in any modern browser on desktop, tablet or mobile.
Frequently Asked Questions
Can I control the watermark opacity?
Yes — the watermark is applied semi-transparently and diagonally so it’s visible without hiding your content.
Does it appear on every page?
Yes, the text is stamped across all pages of the document.
Are my documents safe?
Yes — watermarking happens in your browser and nothing is uploaded.