Question 1

How do I add a watermark to a PDF?

Accepted Answer

Upload your PDF, choose text or image watermark, set position (9-position grid), adjust opacity and rotation, then click Apply. Our tool shows a live preview before you download the watermarked file.

Question 2

Is my PDF uploaded to a server?

Accepted Answer

No. Watermarking happens entirely in your browser using pdf-lib. Your document and any watermark image stay on your device — nothing is ever uploaded.

Question 3

Can I watermark every page or just specific pages?

Accepted Answer

Both. By default the watermark is applied to every page. You can also specify page ranges (e.g., pages 1-3 or only the last page) in the options panel.

Question 4

What image formats work for image watermarks?

Accepted Answer

PNG and JPG are supported. Transparent PNGs work best for logo-style watermarks because they blend naturally with the underlying page content.

Question 5

Can the watermark be removed by someone else?

Accepted Answer

A visible watermark can be covered or cropped, but it's embedded into the PDF content itself — not as a separate removable layer. For tamper-resistant protection, combine a watermark with our PDF Password Protect tool.

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