Add Watermarks to PDF Securely

Yes, our watermark tool is 100% free to use. There are no daily limits, no premium subscriptions, and no hidden branding added to your documents.

Simply upload your file to our web tool, type 'DRAFT' in the text box, adjust the opacity, and click 'Apply'. The entire process happens locally in your browser, meaning your document is never uploaded to an external server.

Yes. Our engine automatically calculates the center of every single page in your document and applies the exact same watermark text, color, and rotation consistently across the entire PDF.

Absolutely. You can use the built-in color picker in the settings panel to select any color (such as bright red, subtle gray, or deep blue) for your watermark.

In the settings panel, simply drag the 'Opacity' slider to the left. We recommend a 20% to 30% opacity so the watermark is clearly visible without obscuring the text beneath it.

Yes. Because it is a web-based application utilizing HTML5 Canvas, it works flawlessly across all operating systems without requiring any software installation.

Yes. The tool is fully responsive. You can easily add a 'CONFIDENTIAL' or 'COPY' stamp to PDFs directly from your mobile device.

To ensure the tool remains lightning-fast, we render a live visual preview of just the first page. However, when you click 'Apply', the watermark is processed and stamped onto every page.

Never. We utilize a strict zero-upload architecture. Your sensitive legal, medical, or financial documents never leave your computer's RAM.

Yes! Use the 'Rotation' slider in the settings panel to angle your text perfectly. 45 degrees is the standard for diagonal page-spanning watermarks.

Because the tool uses your device's local memory (RAM) instead of a remote server, you can process massive documents incredibly fast, limited only by your computer's performance.

No. Our entire PDF stamping engine runs safely and independently inside your modern web browser (like Chrome, Safari, Firefox, or Edge).

Currently, this specific tool is designed exclusively for rendering custom text-based watermarks. Image-based watermarks are not yet supported.

Yes! Once the webpage has fully loaded in your browser, you can disconnect from the internet, and the tool will continue to watermark and save your files securely offline.

No email registration, account creation, or login is ever required to use our local PDF utilities.

Our local engine cannot read heavily encrypted files. You must remove the password protection from your document before attempting to stamp it here.

Yes, the tool modifies the structural data of the PDF, embedding a sharp vector font (Helvetica) over your existing pages without rasterizing or degrading the original quality.

Yes. Since we do not collect, transfer, process, or store your uploaded documents on any server, our tool is inherently compliant with strict global privacy laws.

Yes, you are completely free to use this utility for professional, business, or commercial document management without any licensing issues.

Because there is no upload or download time to a remote server, the stamping process is incredibly fast, usually taking only a few seconds even for large files.

To ensure maximum compatibility and small file sizes, we currently force the use of standard Helvetica Bold for all watermarks. This font is universally supported by all PDF readers.

To prevent the PDF file from crashing during generation, our engine automatically strips unsupported emojis and complex unicode characters from the watermark text.

Once a watermark is permanently baked into the PDF and saved to your device, it cannot be easily removed by our system. Always keep a clean copy of your original file.

Yes, just click the 'Open Different PDF' button at the top to clear the current document and start fresh.

The newly generated file is automatically saved to the default 'Downloads' folder configured in your web browser.