Add Watermark to PDF
Stamp Text on Every Page, Free
Protect your documents with a custom text watermark like "CONFIDENTIAL" or "DRAFT" applied across every page. Choose the position, size, rotation, and opacity, all handled entirely inside your browser never uploaded to a server. 100% free, unlimited use, no account needed.
✅ Reviewed by Rashid Amin, Founder of NexaTools 🕒 Last Updated: August 2026
🖋️ Add Watermark to PDF
🔒 Client-Side OnlyWhat Is a PDF Watermark?
A watermark is text or an image placed across the pages of a document, usually semi-transparent, so it doesn't block the underlying content but still stays visible. On PDFs, watermarks are commonly used to label a document as "CONFIDENTIAL," "DRAFT," or "SAMPLE," or to mark ownership before sharing a file with someone outside your organization.
Unlike a header or footer, a watermark typically sits behind or across the main content, often at an angle, making it hard to miss without covering up the text underneath. Once a watermark is added and the file is saved, it becomes a permanent part of that page's content.
How to Add a Watermark to a PDF Step by Step
Stamping a text watermark across your PDF pages takes less than a minute. Follow these steps:
Upload Your PDF
Drag and drop your PDF file into the upload area, or click to browse your device.
Type Your Text
Enter the watermark text, then adjust position, size, color, and opacity to your liking.
Click Add Watermark
The tool stamps your text onto every page, right in your browser.
Download the PDF
Click "Download PDF File" to save your new watermarked document instantly.
Why Use NexaTools Add Watermark to PDF Tool
Many online watermarking tools require uploading sensitive documents to a remote server, or they lock useful controls like opacity and position behind a paid plan. NexaTools takes a different approach: the entire watermarking process happens locally in your browser using JavaScript, so your document is processed on your own device and is never transmitted anywhere.
100% Private. Your PDF never leaves your device. There is no server upload involved.
Full control. Adjust text, position, size, color, and opacity before applying.
Completely free. No credit card, no hidden fees, no premium tier, unlimited use.
Works everywhere. Fully responsive on desktop, tablet, and mobile browsers.
Who Should Use This Tool
NexaTools Add Watermark to PDF is built for anyone who needs to label or protect a document before sharing it, without installing software or uploading files to a third-party server.
Legal & admin staff marking contracts and drafts as "CONFIDENTIAL" before internal review.
Businesses stamping proposals and reports with a company name or "SAMPLE" label.
Students & teachers marking draft assignments or answer keys clearly as drafts.
Freelancers protecting preview copies of work sent to clients before final payment.
Common Use Cases
People add watermarks to PDFs for many different everyday reasons. Some of the most common include:
Marking confidential files. Add "CONFIDENTIAL" or "INTERNAL ONLY" before circulating sensitive reports.
Labeling drafts. Stamp "DRAFT" across a document that isn't ready for final release.
Protecting previews. Add a "SAMPLE" watermark to preview copies shared before purchase.
Branding documents. Stamp a company or project name across shared PDFs.
How Your Privacy Is Protected
When you upload a file into the tool above, it is read directly by your browser's own file-reading APIs and processed with JavaScript running on your device. At no point is the file sent across the internet to a remote server or stored in any database. Once you close or refresh the tab, the file and the watermarked PDF are simply gone from memory. This local-first design means there's nothing for anyone including NexaTools to access, log, or retain.
Common Problems & Troubleshooting
"Add Watermark" stays disabled. This button only activates after a valid PDF has been uploaded and watermark text has been entered.
"Please enter watermark text." The text field cannot be empty type at least one character before applying.
Watermark looks too light or too dark. Adjust the opacity slider up or down and try again it defaults to a light 30% opacity.
"This file could not be read." The PDF may be corrupted or password protected. Remove any password and try again.
Frequently Asked Questions
Everything you need to know about the NexaTools free Add Watermark to PDF tool.
Ready to Watermark Your PDF?
Stamp your text across every page in seconds free, private, and no signup required.