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How to Add a Watermark to a PDF

A watermark tells every copy of a document what it is: DRAFT, CONFIDENTIAL, PAID, or simply your brand. Adding one does not require Acrobat — Haven PDF stamps text or an image across every page directly in your browser.

And unlike most “free” watermark sites, there is no irony here: no service watermark gets added to your file, nothing is uploaded to a server, and there is no page limit. Contracts and invoices stay on your device while you mark them.

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How to

  1. Open the Watermark tool. Free, in your browser — no sign-up or install.
  2. Add your PDF. The file is processed locally and never uploaded.
  3. Design the watermark. Type the text (e.g. CONFIDENTIAL) or upload a logo; set size, angle, opacity and position.
  4. Apply and download. The watermark is stamped on every page; download the result.

Text or image — which to use

Text watermarks (DRAFT, CONFIDENTIAL, SAMPLE) are best for document status: they compress well and stay readable at any zoom. Image watermarks suit branding — a semi-transparent logo at 10–20% opacity marks ownership without hurting readability.

Getting the look right

The classic diagonal gray stamp works because it is visible without blocking content: 45° angle, 30–40% opacity, centered. For a subtle brand mark, place a small logo in a corner at low opacity instead of tiling it.

A watermark is not redaction

A watermark overlays content; it does not remove anything underneath. If you need to hide sensitive text for good, use the Redact tool — it truly deletes the content rather than covering it.

Frequently asked questions

Will a service watermark be added to my PDF?
No — only the watermark you design. Haven PDF is free without branding your files.
Can I watermark only certain pages?
Apply the watermark, or split the document first with the Split tool and watermark just the part you need.
Is the PDF uploaded while watermarking?
No. Everything runs in your browser; the document never leaves your device.
Can a watermark be removed later?
A flattened watermark becomes part of the page and is hard to remove cleanly — which is usually the point. Keep an unwatermarked original for yourself.

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