Can the watermark be removed?

The watermark is embedded directly in the PDF. It cannot be removed with standard PDF readers.

What rotation angle works best?

45 degrees diagonal is the most common watermark style, making it difficult to crop out while still readable.

Can I add a text or image watermark to a PDF?

Typically yes — you can stamp text such as CONFIDENTIAL or DRAFT, or place an image like a company logo. Text watermarks stay crisp at any zoom, while image watermarks reinforce branding. Adjust opacity so the watermark is visible without hiding the content.

Will the watermark appear on every page?

You can usually apply the watermark across all pages for consistent labeling, or target specific pages. Applying it to every page is best for marking an entire document as a draft or confidential, so no page can be shared without the mark.

What opacity should a PDF watermark be?

Around 20–40% opacity keeps the underlying text readable while clearly marking the document. Lower opacity is subtle for branding; higher opacity gives a stronger deterrent against unauthorized sharing of drafts or proofs.

Does adding a watermark reduce PDF quality?

No. The watermark is drawn as an overlay on each page, and the original text and images stay intact and sharp underneath. The document content quality is unchanged; only the added watermark layer is new.

Is it safe to watermark a confidential document?

Yes. Watermarking runs entirely in your browser, so the file is never uploaded to a server. You can mark sensitive contracts or financial reports as confidential on your own device with no risk of the content being transmitted.

PDF Watermark — Add Text Watermark to PDF Online

How to use Add Watermark to PDF

Add a text or image watermark to every page of a PDF document — entirely client-side with no file uploads. Protect confidential documents, brand your reports, mark drafts as "Confidential" or "Draft", or add copyright notices. Customize font size, opacity, rotation angle, and position to suit your needs.

Upload the PDF you want to watermark.
Choose watermark type: text (enter your text) or image (upload a logo or stamp).
Set font size, opacity (0–100%), and rotation angle for text watermarks.
Choose watermark position: center, tile, or corner.
Click "Add Watermark" and download the protected PDF.

Your data never leaves your device — 100% private processing.

Text vs. image watermarks

Text watermarks are ideal for labels like "CONFIDENTIAL", "DRAFT", "COPY", or copyright notices. They are scalable, resolution-independent, and remain crisp at any zoom level. Image watermarks (logos, stamps, seals) are better for branded documents such as official reports, certificates, or letterheads. For maximum authority, use an image watermark of a notarized seal or corporate logo alongside a text label.

Watermark type comparison
Type	Best for	Opacity guideline
Text — DRAFT	Work-in-progress documents	20–40%
Text — CONFIDENTIAL	Internal distribution control	25–35%
Text — COPY	Distributed document control	20–30%
Image — logo	Branded reports, certificates	15–25%
Image — stamp/seal	Official approvals, awards	60–80%

Opacity and positioning best practices

An opacity of 15–30% places the watermark visibly in the background without obscuring the main content, which is the standard for "draft" and "confidential" labels. For certificate stamps meant to be prominent, 60–80% opacity is common. Diagonal placement at 45° makes watermarks harder to crop out while still allowing the underlying content to be read. Tiled watermarks (repeating across the page) provide the strongest protection against cropping attempts.

Glossary

Opacity: A value from 0% (fully transparent) to 100% (fully opaque) controlling how visible a watermark appears over the page content.
Content stream overlay: The PDF mechanism that places watermark graphics on top of (or beneath) existing page content.
Tiling: Repeating a watermark pattern across the entire page surface to prevent easy removal by cropping.
Stamp: A predefined PDF annotation or overlay that adds a visual mark (APPROVED, DRAFT, VOID) to a document.

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Add Watermark to PDF

How to use Add Watermark to PDF

Text vs. image watermarks

Opacity and positioning best practices

Glossary

Related reading

Frequently Asked Questions

Why use Add Watermark to PDF?

Common use cases

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