Are my PDF files uploaded to a server when I add a watermark?

No. Optimax PDF applies the watermark 100% locally in your web browser using WebAssembly. Your documents remain completely private and never leave your device.

Can I use an image as a watermark?

Yes, you can upload a PNG or JPG image (like your company logo) and adjust its opacity, rotation, and position on the page.

100% Local & Private

Watermark PDF

Add text or image watermarks to your PDF files.

Select PDF to Watermark

100% Local Processing

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Watermark Options

Place text

Place image

Text

Text format

Position

Mosaic

Opacity 30%

Rotation

Layer

Over the PDF

Below the PDF

Watermark PDF

Watermark Options

File is Password Protected

Watermark Applied!