DangKit

Add Watermark

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Add text watermark to PDF pages

Processed in your browser
No files uploaded to servers
HTTPS encrypted transfer
Your files are processed securely and automatically deleted from our servers after 1 hour. We never access or share your data.

What is Add Watermark?

PDF Watermark overlays text (such as "CONFIDENTIAL", "DRAFT", or "COPY") onto every page of a PDF โ€” a standard practice for marking document status or ownership.

When to use this tool

  • Marking a document as "DRAFT" or "CONFIDENTIAL"
  • Adding a copyright notice to every page
  • Overlaying a "SAMPLE" watermark on preview documents
  • Branding documents with a company name

How it works

Uses pdf-lib to render a large, semi-transparent text element centered on each page. Configurable options include text content, font size, opacity, rotation angle, and color.

Security Guidelines

  • Watermarks are visual overlays only โ€” they do not prevent text extraction or copying
  • For true document protection, combine with password protection

Examples

Draft watermark
Input: proposal.pdf
Output: proposal.pdf with "DRAFT" watermark on every page

About Add Watermark

Add text watermark to PDF pages It runs entirely in your browser โ€” no files are uploaded to any server, ensuring complete privacy and instant results.

  • โ€ขMerge, split, and rotate PDF pages
  • โ€ขAdd watermarks and page numbers
  • โ€ขConvert PDFs to text or Markdown
  • โ€ขSign and protect PDFs with passwords

Last updated: 2025-01-15

FAQ

Add text watermark to PDF pages

Yes, completely free. No signup required.

Yes. Runs entirely in your browser, no files uploaded.

Yes, works on any device with a modern browser.

No, everything runs in your browser.

Add Watermark โ€” Free Online Tool | DangKit