PDF Watermark Tool – Add Text Watermarks to PDF Files Online
The PDF Watermark Tool helps you add a text watermark to your PDF document directly in your browser. You can enter custom watermark text, adjust its size and opacity, choose its rotation and position, and apply it to all pages, the first page, or the last page. This tool is useful for marking documents as confidential, adding ownership labels, and identifying important PDF files.
Features of the PDF Watermark Tool
Custom Watermark Text: Enter your own text or use the default CONFIDENTIAL label.
Adjustable Font Size: Choose small, medium, large, or extra-large text.
Opacity Settings: Set the watermark opacity to 20%, 35%, 50%, or 70%.
Text Rotation: Select 0°, -45°, 45°, or 90° rotation.
Multiple Position Options: Place the watermark in the center, at the top or bottom, or in any of the four corners.
Flexible Page Selection: Apply the watermark to all pages, only the first page, or only the last page.
Automatic PDF Download: Download the processed document as
watermarked-pdf.pdf.Mobile-Friendly Design: Use the tool on desktop computers, tablets, and compatible mobile devices.
How to Add a Watermark to a PDF
Follow these steps to create your watermarked PDF file.
Open the PDF Watermark Tool on this page.
Click Select PDF and choose a PDF document from your device.
Enter the watermark text you want to display.
Select the font size and opacity.
Choose the text rotation and position.
Select whether to apply the watermark to all pages, the first page, or the last page.
Click Add Watermark and wait while the tool processes your document.
Download the watermarked PDF when processing is complete.
Available Watermark Customization Options
The tool provides several settings to help you control how the watermark appears on your document.
| Setting | Available Options |
|---|---|
| Watermark text | Custom text |
| Font size | Small, Medium, Large, Extra Large |
| Opacity | 20%, 35%, 50%, 70% |
| Rotation | 0°, -45°, 45°, 90° |
| Position | Center, Top, Bottom, Top Left, Top Right, Bottom Left, Bottom Right |
| Apply to pages | All Pages, First Page, Last Page |
The watermark uses bold Helvetica text in a dark gray color. You can adjust its size, transparency, angle, and placement to suit your document.
Benefits of Using a PDF Watermark
A watermark can help identify a document and communicate how it should be handled. For example, you can add CONFIDENTIAL to internal business documents, DRAFT to documents under review, or your organization name to files shared with colleagues.
The tool can also save time when you need to label multiple pages. Instead of editing each page separately, you can apply the same watermark across the entire PDF in one process.
Keep in mind that a watermark is a visual label, not a security feature. It does not prevent someone from copying, editing, printing, or sharing the document.
Is the PDF Watermark Tool Free to Use
You can use the tool available on this page to add text watermarks without installing a separate PDF editing application. You only need a compatible browser and a PDF file on your device.
Is It Safe to Add a Watermark to a PDF Online
This tool processes the selected PDF in your browser using the PDF-lib JavaScript library. The provided code does not upload the PDF to a server for processing. However, the library itself is loaded from an external CDN, so an internet connection is required for the tool to work when the library is not already available in the browser.
For sensitive documents, use a trusted device and browser. Always keep an original copy of your PDF before making changes.
Conclusion
The PDF Watermark Tool provides a simple way to add custom text to PDF documents. You can choose the watermark size, opacity, rotation, position, and pages where it should appear. Whether you need to label a confidential document, mark a draft, or identify a business file, this tool helps you create a watermarked PDF and download the result in a few steps.