Add Watermark to PDF Online Free

How to Add a Watermark to a PDF Online

Adding a watermark to your PDF is quick and simple with Devine Tools. Follow these steps to protect your documents and highlight important information.

1. Click the “Choose PDF File” button and select the PDF you want to watermark.
2. Enter your watermark text such as “Confidential”, “Paid Copy”, or your brand name.
3. Adjust the font size and opacity based on how subtle or bold you want the watermark.
4. Click “Apply Watermark” to stamp the text on every page of your PDF.
5. Click “Download Watermarked PDF” to save the new file to your device.

Features of Our Add Watermark to PDF Tool

• Free to use: Add watermarks to unlimited PDFs without any sign-up or charges.
• Browser-based processing: All watermarking happens locally in your browser for maximum privacy.
• Custom watermark text: Enter any text such as “CONFIDENTIAL”, “DRAFT”, “SAMPLE”, or your business name.
• Adjustable font size: Make your watermark subtle or highly visible by changing the font size.
• Configurable opacity: Set the transparency so the watermark doesn’t block the main content.
• Applies to every page: Your watermark is added to all pages in the PDF automatically.
• Mobile friendly: Works on desktop, tablet, and modern mobile browsers.

Why Use Devine Tools to Add Watermarks to PDF Files?

Devine Tools focuses on simple, secure, and fast PDF utilities. Our Add Watermark to PDF tool is built for real-world workflows like sharing drafts, protecting intellectual property, and branding documents.

• Privacy-first design: Unlike many online tools, your PDFs are never uploaded to any server.
• No technical skills required: Clean interface makes watermarking easy for anyone.
• Cross-platform support: Works on Windows, macOS, Linux, Android, and iOS.
• Part of a complete PDF toolkit: Combine with merge, compress, split and protect tools on Devine Tools.

When Should You Add a Watermark to Your PDF?

Watermarks are useful whenever you want to communicate the status of a document or protect your content.

• Confidential documents: Add “Confidential” to internal reports, contracts, or legal files.
• Draft versions: Label documents as “Draft” to avoid confusion with final versions.
• Paid material: Mark invoices, receipts, or purchased eBooks with “Paid Copy”.
• Branding: Add your company or website name to presentations and shared documents.
• Training material: Watermark slides and PDFs used for courses or workshops.

Is This Add Watermark to PDF Tool Safe?

Yes. This tool uses the pdf-lib JavaScript library to edit your PDF entirely inside your browser. The file is never uploaded or stored on any server. Once you close the page, the in-memory data is no longer accessible.

For additional safety, use this tool on a trusted device and avoid working with highly sensitive documents on public computers or unsecured networks.