Are NanoTools completely free to use?

Yes, all basic tools on NanoTools are completely free to use with no registration required. We offer premium features for power users.

Is my data secure when using NanoTools?

Your files are processed securely and are automatically deleted after processing. We do not store your files or data on our servers.

No installation required. All tools work directly in your browser on any device - computer, tablet, or smartphone.

We support a wide range of formats including PDF, JPG, PNG, WebP, GIF, JSON, XML, CSV, and many more depending on the tool.

Add watermark to PDF online for free. Protect documents with text or image watermarks. Customize position and opacity.

Drop PDF files here or click to browse

.pdf, application/pdf • Max 50MB

1

Select the document you want to watermark

2

Select text or image watermark and configure appearance

3

Set location, opacity, rotation, and size

4

Save the PDF with your watermark applied

Yes, you can adjust opacity from 0% (invisible) to 100% (fully opaque).

Currently one watermark per operation, but you can process the file multiple times to layer watermarks.

Text remains selectable and searchable beneath watermarks set with transparency.

PNG, JPG, and WebP images can be used as watermarks.