Watermark PDF

Our Watermark PDF tool allows you to add custom text across every page of your PDF document. Whether you need to mark a document as "CONFIDENTIAL", "DRAFT", or add your company name, you can do it instantly.

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Stamp Your PDF with a Custom Watermark

Our Watermark PDF tool allows you to add custom text across every page of your PDF document. Whether you need to mark a document as "CONFIDENTIAL", "DRAFT", or add your company name, you can do it instantly.

All watermarking is processed entirely within your web browser. This means your sensitive documents are never uploaded to any external server, ensuring maximum privacy and security.

Key features

  • 100% Client-Side Security We use advanced Web technologies to apply the watermark locally on your device. Your data never leaves your browser.
  • Customizable Opacity Adjust the transparency of your watermark text so it does not interfere with reading the actual document.
  • Instant Generation Since there are no server uploads or downloads, your watermarked PDF is generated in milliseconds.
  • Completely Free No hidden costs, no limits, and no registration required.

How to Add a Watermark to a PDF

Follow these simple steps to stamp your PDF document.

  1. Upload File Click the upload area or drag and drop your PDF file into the dropzone.
  2. Enter Text Type the watermark text you want to appear on the pages (e.g., "CONFIDENTIAL").
  3. Set Opacity Adjust the opacity slider between 5 and 100 to make the text fainter or more solid.
  4. Process Click "Process now" and download your newly watermarked PDF.

Usage tips

  • The watermark will be placed diagonally across the center of every page in your PDF.
  • A lower opacity (around 15-30) is recommended so that the original text beneath the watermark remains readable.
  • Use short, impactful words like "DRAFT", "COPY", or "CONFIDENTIAL" for best results.

Frequently asked questions

No. All processing happens entirely within your web browser. We never upload, store, or see your files.
Currently, the watermark is applied in a standard gray color to ensure it acts as a subtle background stamp without clashing with your document.
This specific tool is designed for text watermarks. We are working on adding image watermark support in future updates.