Watermark PDF
Free online tool to watermark pdf instantly in your browser.
Watermark PDF
Stamp a custom text watermark across every page of your PDF.
Drop your PDF here
or click to browse from your computer
Watermark Options
35%
Free Online PDF Watermark — Add Text Stamps to Documents
Watermarking your PDF documents is essential for protecting intellectual property, marking documents as drafts, or applying a confidential stamp. Our free PDF Watermark tool allows you to overlay a large, diagonal text stamp across every page of your PDF instantly.
How to Add a Watermark to a PDF
- Upload PDF: Select the document you wish to watermark.
- Enter Text: Type the watermark text. Common examples include CONFIDENTIAL, DRAFT, DO NOT COPY, or your company name.
- Adjust Opacity: Change the transparency of the watermark so it doesn't obscure the underlying text of your document.
- Download: Click Apply to generate the new, watermarked PDF.
Is the Watermark Permanent?
Yes. The text is drawn directly into the PDF content stream using `pdf-lib`. While advanced PDF editors might be able to remove it layer by layer, it acts as a strong deterrent against casual copying or screenshotting.