PDF Watermark

Stamp Confidential Text on PDF Pages

Protect confidential documents by stamping custom text (e.g. CONFIDENTIAL, DRAFT, COPY) with customizable opacity, rotation, and font color across all pages.

About PDF Watermark

Prevent unauthorized distribution and clearly mark document status by stamping custom text watermarks across every page of your PDF file. Whether you need a bold red "CONFIDENTIAL" stamp across financial records or a subtle angled copyright notice on client reports, the FastFreeTools PDF Watermarker applies vector text overlays directly in your browser.

Key Features & Benefits

  • Apply custom text stamps to every page in a single operation.
  • Customize text color, font size, angle rotation, and transparency.
  • Preserves existing document hyperlinks, text layers, and vector charts.
  • Executes locally with zero data transfer.

How to Use PDF Watermark

  1. Select PDF: Drop your document into the watermarking workbench.
  2. Enter Text: Type your watermark (e.g. CONFIDENTIAL, DRAFT, APPROVED).
  3. Tune Appearance: Adjust opacity, font size, color, and diagonal angle.
  4. Save Document: Download your stamped PDF document.

Common Use Cases

  • Confidential Business Audits (Enterprises & Managers): Stamp "INTERNAL ONLY" or "DO NOT DISTRIBUTE" across sensitive reports.
  • Draft Agreement Review (Attorneys & Contracting Teams): Overlay "DRAFT" across preliminary contracts before final execution.

Technical Specifications

  • Engine: pdf-lib v1.17 Vector Text Embedding
  • Execution Mode: Local PDF Mutation
  • Privacy Guarantee: Absolute Privacy
  • Input Formats: PDF (.pdf)
  • Output Formats: Watermarked PDF (.pdf)

Frequently Asked Questions

Can the watermark be easily removed by viewers?

The watermark is burned directly into the PDF page drawing instructions, making casual removal difficult.

Will watermarking increase file size significantly?

No, vector text overlays add only a negligible few kilobytes to the total file size.

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