Add Watermark to PDF – Free Online PDF Watermark Tool
Add custom text watermarks to PDF files. Customize position, font size, opacity, and color. Free, no upload required.
Click to upload or drag & drop
PDF files up to 50MB
Frequently Asked Questions
You can use any text — common examples include CONFIDENTIAL, DRAFT, DO NOT COPY, SAMPLE, or your company name.
Yes. You can customize the text, position (center, diagonal, or any corner), font size (16–120pt), opacity (5–100%), and color.
Yes. The watermark is added to every page of the PDF document.
The watermark is embedded as text in the PDF using pdf-lib. It can be removed with advanced PDF editing software, but it discourages casual copying.
No. All processing is done client-side in your browser using pdf-lib. Your files never leave your device.
What is Add Watermark to PDF – Free Online PDF Watermark Tool?
A PDF watermark tool adds a text overlay to every page of a PDF document. Common uses include marking documents as CONFIDENTIAL, DRAFT, SAMPLE, or adding a company name. Our tool uses pdf-lib running in your browser to embed the watermark text directly into the PDF pages.
How to Use Add Watermark to PDF – Free Online PDF Watermark Tool
- 1Upload your PDF file.
- 2Enter your watermark text.
- 3Choose position, font size, opacity, and color.
- 4Click Add Watermark & Download.
Key Features
- ✓Custom watermark text
- ✓6 position options including diagonal
- ✓Font size 16–120pt
- ✓Opacity 5–100%
- ✓Color picker
- ✓Runs in your browser with pdf-lib
Benefits
- →Mark confidential documents before sharing
- →Add DRAFT stamps to work-in-progress PDFs
- →Brand PDFs with your company name
Why Use Irreva for Add Watermark to PDF – Free Online PDF Watermark Tool?
Frequently Asked Questions
Is my PDF uploaded to a server?
No. pdf-lib adds the watermark locally in your browser.
Can the watermark be removed?
The watermark is embedded as a text layer. It can be removed with advanced PDF editing tools, but it deters casual copying.
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