Add Watermark
Stamp text or image watermarks onto PDF pages offline.
Drag & drop your file here or click to select
Fully client-side, local execution
What Is Add Watermark?
The **Add Watermark** is a highly secure, client-side browser utility in our **PDF Tools** suite, designed to help you add text watermark stamps to document margins locally. Whether you are managing personal files, corporate documents, or creative assets, this standalone tool provides a seamless, zero-config workspace to execute your tasks with high efficiency. Unlike traditional online PDF editors that force you to upload sensitive documents to remote cloud servers—posing severe data compliance risks—our client-side converter processes everything directly in your browser's memory using secure WebAssembly modules. Your file contents never traverse the network. Since all scripts, parsers, and libraries run client-side, the **Add Watermark** offers complete offline support once loaded and works flawlessly across mobile screens, tablets, and desktop setups. Enjoy unlimited access with no queues, account registrations, or watermarks.
Key Features
- 100% Local Processing: All Add Watermark operations execute directly inside your browser memory context using WebAssembly layers. Your files never leave your device.
- Fast Client-Side Execution: Splitting, merging, compressing, or rotating PDF files happens instantly, bypassing server queue waits and network lags.
- Preserve Original Formatting: Retain document structure, embedded text fonts, alignments, and high-fidelity page layouts intact.
- Complete Offline Support: Once loaded in your browser, you can modify, split, or secure documents without internet access.
How To Use
- 1 Select your PDF document from your local storage or drag and drop it into the designated upload area.
- 2 Specify options in the settings panel (such as quality scales, page ranges, passwords, or order lists).
- 3 Click the action button to process the PDF document locally using browser scripting.
- 4 Review the output preview in the workspace and click the download button to save it locally.
Example Usage
You can use the **Add Watermark** to safely modify sensitive reports, consolidate client invoices, extract key transaction pages, or prepare legal documents before email distribution. It runs entirely local, so it is perfect for security-regulated office files.
Frequently Asked Questions
Yes. The **Add Watermark** parses and processes your PDF documents entirely inside your browser tab using PDF-lib and PDF.js. No file bytes are sent to external servers, securing compliance with corporate data safety rules.
No. The **Add Watermark** is 100% free with no registration, usage limits, or watermark insertions. You can use it as much as you need.
Yes. Once the page is loaded in your browser, the **Add Watermark** runs completely client-side. You can disconnect your internet and continue using it without interruption.
Privacy Promise
This tool runs entirely inside your browser. Your files never leave your device.