Add a PDF Watermark (Text)

Insert semi-transparent text across all pages of your document to firmly assert ownership.

Select the PDF to stamp

Drag the corporate file here or click to securely upload

Why is it absolutely essential to add a text watermark to your PDFs?

Sharing crucial documents online always carries inherent risks. B2B commercial proposals, copyrighted photographs, project drafts, or confidential legal documents can easily be copied, forwarded, or utilised without your explicit consent. Inserting a watermark acts as an unequivocal declaration of ownership or clearly defines the legal status of a document before it gets distributed.

An indelible and highly professional stamp

Our tool applies your chosen text diagonally and semi-transparently across the dead centre of every page. This way, the document remains perfectly readable for your client, but your 'stamp' cannot be easily stripped or ignored. It’s the ultimate digital solution for sending files marked as 'DRAFT', 'STRICTLY CONFIDENTIAL', 'CLIENT COPY', or customised with your UK company name to heavily deter plagiarism.

Guide: How to apply a text watermark to a PDF securely

Step-by-step instructions

  1. Upload the PDF document you genuinely wish to protect by clicking the secure upload button or dragging it in.
  2. Type your desired watermark text in the dedicated field (e.g., 'CONFIDENTIAL' or 'PRIVATE').
  3. Click the blue 'Stamp Document' button.
  4. Wait a few brief moments and download the file with the vector watermark seamlessly applied to all pages.

The technological advantages of PDFLab

  • Automatic page geometry: The cloud system automatically calculates the exact dimensions of each individual UK A4 page to position the text perfectly in the centre with the ideal diagonal tilt.
  • Free and completely clean: We absolutely do not dirty your business files with our own corporate logos. We only insert the specific text you typed.
  • Guaranteed Privacy: The processed file is automatically and irretrievably destroyed from our secure EU servers 1 hour after processing (100% GDPR compliant).