PDF Watermark
Stamp customized text watermarks like CONFIDENTIAL or DRAFT across your PDF pages.
Add custom security watermarks like CONFIDENTIAL, DRAFT, COPY, or your company name across every page of your PDF. Adjust transparency, angle, and size to protect your intellectual property directly in your browser.
About Add Watermark to PDF
PDF Watermark provides essential intellectual property protection for sensitive business proposals, contract drafts, financial evaluations, and creative manuscripts before distribution to external reviewers.
How to Use Add Watermark to PDF
- Upload your PDF: Choose the document you want to protect with a watermark.
- Customize watermark text: Type your watermark phrase such as CONFIDENTIAL, DRAFT, or your brand name.
- Tune opacity level: Adjust the transparency slider so your watermark protects without obscuring underlying text.
- Download watermarked PDF: Save your newly protected document in one click.
Key Features
- Custom text watermark input
- Adjustable opacity slider (10% to 90%)
- Dynamic 45-degree diagonal placement
- Applies consistently across all document pages
- Completely client-side and private
Common Use Cases
- Marking pre-release contracts and NDAs as CONFIDENTIAL.
- Labeling unfinalized business proposals and reports as DRAFT.
- Watermarking sample portfolios and design proofs to prevent unauthorized re-use.
Frequently Asked Questions
Will the watermark obscure the text beneath it?
No. By adjusting the opacity slider to a subtle 20%–30%, your text remains completely legible while clearly branded.
Can someone easily remove the watermark?
The watermark is embedded directly into the PDF rendering stream across every page, preventing casual deletion.
Are my confidential business documents safe?
Yes, all watermarking happens inside your browser without any files being transmitted across the internet.
Does this tool support multi-page documents?
Yes, the watermark is applied consistently to every page in the document regardless of page count.
Privacy Guarantee
Document watermarking executes entirely within your browser using pdf-lib. No external server receives your file.
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