What is a PDF Watermark?
A watermark is text (or, in some tools, an image) stamped across every page of a document — commonly used to mark a file as "CONFIDENTIAL," "DRAFT," or "DO NOT COPY," or simply to brand a document with a company name. Our tool lets you add a watermark to a PDF online with your own custom text, color, size, and transparency, applied consistently to every page in one step.
How to Add a Watermark to a PDF — Step by Step
- Upload your PDF. Drag and drop the PDF you want to watermark into the box above.
- Customize your watermark. Type the watermark text and adjust its color and opacity to taste.
- Apply and download. Click "Add Watermark" and download the PDF with the watermark stamped on every page.
Why Use Our Watermark Tool?
- Custom text, color, and opacity — not a fixed "SAMPLE" stamp.
- Applied consistently across every page of the document.
- Private — your file is automatically deleted within 2 hours.
- Free, fast, and works with no signup.
Frequently Asked Questions
Can I control how see-through the watermark is?▾
Yes — use the opacity slider to make it subtle or bold, from barely visible to fully solid.
Will the watermark cover my document's text?▾
The watermark is drawn semi-transparently across the page by default so the underlying content stays readable; lower the opacity further if you want it even lighter.
Can I remove a watermark later?▾
The watermark becomes part of the page content, so it cannot be removed with this tool once applied — keep a copy of your original file.
Is there a limit on watermark text length?▾
Watermark text can be up to 100 characters.
Related Tools
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- Crop PDF Page — Crop margins or content area from PDF pages.
- Organize PDF — Reorder, delete or duplicate PDF pages.