PDF Watermark Stamp & Protect Your Work

Add custom text overlays to your documents. Perfect for copyright protection, 'DRAFT' labeling, or company branding.

Drag & Drop PDF files or Folders here

or click to browse

Files remain on your device.

How to Add Watermark

Brand your docs in 3 steps.

1. Upload & Split

Select a PDF file. We automatically split merged documents into individual pages for easy handling.

2. Customize

Type your text, adjust rotation, size, and transparency. See updates instantly on all page previews.

3. Save Your Way

Download specific watermarked pages individually or save the entire collection as a ZIP archive.

Instant Stamping

Apply to 100+ pages in seconds.

100% Private

Files never leave your browser.

All Devices

Works on Mac, Windows, iOS, Android.

Protect Your Intellectual Property

Scanned documents often come with pages out of order, upside down, or containing blank sheets that waste space. NanoZipt's Watermark Tool allows you to assert ownership over your files effortlessly.

Why Use a Digital Stamp?

A visual watermark acts as a deterrent against plagiarism and unauthorized use. By overlaying semi-transparent text like "CONFIDENTIAL", "DRAFT", or your company name across every page, you ensure that the document's origin and status are unambiguous, even if it gets printed or screenshotted.

Pro Tip: Use a high rotation angle (like 45 degrees) and large font size to make the watermark span diagonally across the entire page. This makes it much harder for someone to crop or edit out.

Frequently Asked Questions

Can I remove the watermark later?

Once a watermark is flattened into the PDF using this tool, it becomes a permanent part of the page content. While advanced editors might be able to remove it, standard PDF readers cannot.

Does this work on all pages?

Yes, by default the watermark is applied to every single page of every document you upload, ensuring consistent protection throughout.

Is my document uploaded?

No. NanoZipt processes your file locally using JavaScript. Your confidential documents never leave your computer or travel over the internet.