Watermark PDF

Add customizable text watermarks to your PDF documents to protect your work.

How To Use

  1. Upload PDF — Select the document to watermark.
  2. Customize — Set your watermark text, opacity, size, and position.
  3. Download — Get your watermarked PDF instantly.

How to Watermark a PDF

Adding watermarks to PDF documents is an essential practice for protecting intellectual property, marking documents as confidential, indicating draft status, or branding your documents. This tool lets you add text watermarks with customizable opacity, font size, placement, and rotation options.

Choose from center, diagonal, or tile positions to suit your needs. Low opacity (20-30%) works well for "confidential" or "draft" markings that don't obscure the content. Higher opacity is suitable for branding. The watermark is applied using pdf-lib's drawing capabilities directly in your browser.

All processing happens locally — your document never leaves your device. Perfect for legal documents, business proposals, academic papers, and any PDF that needs protection or branding. No file size limits, no uploads, no registration.