How to Add a Watermark to a PDF for Free (CONFIDENTIAL, DRAFT, etc.)
Stamp any text watermark — CONFIDENTIAL, DRAFT, SAMPLE — onto every page of a PDF in your browser. Adjust opacity, download instantly, nothing uploaded.
Watermarks serve two purposes: branding (showing ownership) and security (marking documents as DRAFT, CONFIDENTIAL, or SAMPLE). Adding a watermark to a PDF used to require Adobe Acrobat. Now you can do it free, directly in your browser.
Add a Text Watermark in Your Browser
- Open the PDF Watermark tool.
- Upload your PDF file.
- Type your watermark text (e.g., CONFIDENTIAL, DRAFT, DO NOT COPY, your company name).
- Adjust the opacity slider — subtle watermarks (20–30% opacity) for professional documents, higher for samples.
- Click Apply and download the watermarked PDF.
When to Use Watermarks
- DRAFT: Mark working documents that aren't finalized
- CONFIDENTIAL: Remind recipients of the document's sensitivity
- SAMPLE: Share content previews without giving away the full document
- Company branding: Add your business name or logo text to shared materials
- Review copies: REVIEW ONLY or DO NOT DISTRIBUTE to track document distribution
Are Watermarks Permanent?
Text watermarks in PDFs are rendered into the page content stream — they appear on every page and cannot be removed without specialized software. However, they are not a security mechanism against determined removal; they serve as a visual deterrent and reminder.
Privacy: Files Stay on Your Device
The watermark tool processes your PDF entirely in the browser using pdf-lib. Your document is never uploaded to any server. This matters especially for confidential materials where the watermark is most needed.