Add Watermark
Add custom watermarks to your PDFs.
How to Add Watermark Online for Free
The Add Watermark tool lets you stamp text or image watermarks across your PDF pages using cutting edge WebAssembly technology, entirely within your web browser. No software installation, no account creation, and no file uploads to external servers.
Watermark Your PDF Documents
Protect your intellectual property and identify document status with customizable watermarks. The Add Watermark tool lets you overlay text (such as “CONFIDENTIAL”, “DRAFT”, or your company name) or image logos across every page of your document. You can control the watermark position, rotation angle, opacity, font size, and color. This is commonly used by photographers protecting portfolio PDFs, businesses marking internal documents as confidential, publishers adding copyright notices, and legal teams stamping document versions or review status indicators.
How to Use This Tool
- Select your file: Click the upload area or drag and drop your PDF file directly onto the page. The file is loaded into your browser’s memory and never leaves your device.
- Adjust your settings: Configure any available options in the tool workspace. Preview changes in real time before committing.
- Process and download: Click the action button to process your file. The result will be ready to download within seconds, saved directly to your device.
Privacy and Security
All processing happens locally on your device using WebAssembly. Your files are never uploaded to any server, which means your sensitive documents remain completely private. This is fundamentally different from most online PDF tools that require you to upload your files for server side processing. With Wexira, even your internet connection could be disconnected after the page loads, and the tool would still work perfectly.
Compatibility
This tool works on all modern web browsers including Chrome, Firefox, Safari, and Microsoft Edge. It is fully functional on both desktop computers and mobile devices including smartphones and tablets. No browser extensions or plugins are required.
How to Use This Tool
Drag your file here or click to choose one from your device. It stays local.
Choose your settings or edit your file directly in the workspace container.
Click the process button and save the new file straight to your downloads.
Why Use This Tool?
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100% Private
Your files never leave your device. All processing happens in your browser using WebAssembly technology.
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Instant Processing
Powered by WebAssembly for lightning fast results, with no server wait times or queues.
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Free Forever
No registration, no subscriptions, no hidden costs. Unlimited usage for everyone.
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Works Everywhere
Compatible with Chrome, Firefox, Safari, Edge on desktop and mobile devices.
Frequently Asked Questions
Is Add Watermark free to use?
Yes, absolutely! Every single tool here is completely free. There are no limits, no hidden subscription costs, and you don't even have to sign up or share your email address. Just use it as much as you need.
Is it safe to add watermark online?
Yes, it is 100% safe. Most online PDF tools copy your files to their servers, but we don't. We use a browser-based technology called WebAssembly to do all the heavy lifting locally on your own computer. Your files never leave your device.
What file size can I process?
Because the tools process your files directly on your computer, we don't impose any file size limits at all. The only limit is what your computer or phone can handle, meaning you can easily edit files that are 100MB or larger.
Do I need to install any software?
No, you don't need to download or install anything. All you need is a standard web browser (like Chrome, Safari, or Firefox). Just load this page, drag in your file, and you're good to go.