Watermark PDF

Stamp custom text or image watermarks onto your PDF documents securely online instantly.

Drop a PDF here

or click to browse

CONFIDENTIAL
All processing happens locally on your device — your files are never uploaded to any server.

How to Add a Watermark

Stamp a custom text overlay onto your PDF to protect your intellectual property.

1. Upload PDF

Select the document you want to protect with a watermark.

2. Customize Text

Type your watermark (e.g., "CONFIDENTIAL"), and adjust the opacity and rotation.

3. Stamp PDF

Click apply. We will instantly burn the watermark into the center of every page.

Frequently Asked Questions

Watermarking is essential for sharing drafts or sensitive files. By running locally, the raw file is never exposed.

Is my data private and secure?

Yes, absolutely 100%. By utilizing modern local browser technologies, we process your files directly on your computer or phone. No servers, no uploads, no compromises.

How fast is the processing?

Because there are no uploads or downloads to a remote server, processing is virtually instant. Even large PDF files are processed in milliseconds without eating up your network bandwidth.

Is the watermark transparent?

Yes! The watermark is applied with a semi-transparent opacity so the underlying text of your document remains fully readable.

Are there any limits or watermarks?

Enjoy completely unrestricted access to the tool! You can use it an unlimited number of times for free. We never artificially cap your file sizes, demand subscriptions, or ruin your final documents with unwanted branding or watermarks.