Watermark PDF
Add a text or image watermark to your PDF pages.
Drag & drop your files here
or pick from your device
Supported formats: PDF
How to use
- 1
Upload your PDF file.
- 2
Type the watermark text and choose its layout, size, and opacity.
- 3
Click "Convert" and download the watermarked file.
About the Watermark PDF tool
A watermark is the simplest way to protect documents from unauthorized reuse: the word "CONFIDENTIAL" or "DRAFT" or your company name stamped on every page makes the file's origin obvious and misappropriation harder. You control the text, size, opacity, and layout — a diagonal center mark, or a tiled pattern covering the whole page so it can't be cropped out.
The mark is applied to every page at once and becomes a permanent part of the file's content, all inside your browser with no upload — which matters most for the very files that need a confidentiality stamp. For stronger protection with a password and encryption, combine it with the Protect PDF tool.
When do you need this tool?
Stamping drafts before review
Mark non-final copies as "DRAFT" so they never get confused with the approved version as they circulate between teams.
Protecting work and proposals
Add your name or company mark to proposals and designs sent to clients before the contract is signed.
Classifying internal documents
Label files "CONFIDENTIAL" or "INTERNAL USE ONLY" so everyone who receives them knows the sharing boundaries instantly.
Why ToolsRio?
Real privacy
All processing happens inside your browser. Your files are never uploaded to any server, and nobody can see them — not even us.
Free without limits
No watermark, no file-count limits, and no hidden paid tiers.
Instant speed
No waiting for uploads and downloads to a remote server — processing starts immediately on your device.
No sign-up
No account, no email, no annoying ads. Open the tool and use it right away.
Frequently asked questions
Can I control the watermark's opacity?+
Yes, you can freely adjust opacity from very light to bold and clear.
What's the difference between diagonal and tiled layout?+
Diagonal places a single tilted text in the page center, while tiled repeats the text across the whole page to prevent it being cropped out.
Is the watermark added to every page?+
Yes, it's automatically applied to every page in the file with the same settings.