Can a watermark be removed from a PDF?

Yes, in most cases. Watermarks are visual overlays, not security features. Someone with a PDF editor can usually select and delete the watermark object. Flattening and password-protecting makes removal harder but not impossible.

Can I add a watermark to every page at once?

Yes. Every modern PDF watermarking tool applies the watermark to all pages by default, or to a specified page range.

Does the watermark affect the PDF's file size?

Text watermarks add negligible size — a few kilobytes. Image watermarks add more, depending on image resolution; a logo PNG might add 20–100KB per page.

Can I watermark a password-protected PDF?

You need to unlock it first. Use a PDF unlock tool to remove the password, apply the watermark, then re-apply protection if needed.

Should I use text or image watermarks?

Text watermarks are faster and easier to update — use them for status markers like DRAFT or CONFIDENTIAL. Image watermarks look more polished for brand or logo applications.

How to Add a Watermark to a PDF (2026)

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