How to Add a Watermark to a PDF for Free (Text Watermark)

A "CONFIDENTIAL" stamp across every page of a sensitive document. A "DRAFT" watermark on a contract that isn't finalised yet. A copyright notice on a PDF you're sharing publicly. All of this takes under a minute, and no Adobe subscription required.

Why Add a Watermark to a PDF?

PDF watermarks serve several practical purposes:

• Confidentiality - Marking sensitive documents so recipients know they shouldn't be forwarded or shared further
• Draft status - Clearly indicating that a document is not final and shouldn't be acted upon
• Copyright - Asserting ownership of original content distributed as PDF
• Client proofing - Sending previews of work with a watermark until final payment is made
• Branding - Adding a company name or logo text across all pages for distributed materials

How to Add a Text Watermark to a PDF

LovePDFImg's PDF Watermark tool stamps text across every page of a PDF - diagonally across the centre or in a position of your choice. You control the text, font size, opacity, and colour.

1. Open PDF Watermark on LovePDFImg.
2. Upload your PDF.
3. Enter your watermark text - e.g. CONFIDENTIAL, DRAFT, © YourCompany 2026.
4. Adjust font size, opacity, and colour.
5. Click Add Watermark.
6. Download the watermarked PDF - every page now carries the stamp.

Common Watermark Text Options

• CONFIDENTIAL - For sensitive internal documents
• DRAFT - For documents that are not yet final
• DO NOT DISTRIBUTE - For materials with restricted sharing
• SAMPLE - For preview versions of paid content
• © YourName 2026 - Copyright assertion for published PDFs
• YourCompany.com - Branding on distributed materials

Opacity: How Visible Should the Watermark Be?

The right opacity depends on the purpose:

• High opacity (70–100%) - Used for strong deterrence. Text is very visible and hard to ignore. Best for CONFIDENTIAL and DRAFT stamps.
• Medium opacity (30–50%) - Visible but doesn't obscure the content beneath. Good for copyright notices on documents people need to actually read.
• Low opacity (10–20%) - Very subtle. Works for light branding on client-facing materials where the watermark should be noticed but not distracting.

PDF Watermark vs Image Watermark

If you need to watermark photos or images rather than PDF documents, LovePDFImg also has an Image Watermark tool that adds text to JPG, PNG, and WebP files with a live preview. The two tools are separate because the underlying technology is different - PDF watermarking uses pdf-lib to draw directly onto PDF pages, while image watermarking uses the Canvas API.

Removing a Watermark Later

Watermarks added with LovePDFImg are permanently drawn onto the PDF page content - they cannot be removed without re-creating the document from scratch. This is by design for confidentiality and draft-marking purposes: recipients cannot simply strip the watermark and use the document as if it were final.

For this reason, always keep an unwatermarked copy of your original PDF before adding a watermark, so you can produce a clean final version when ready.

After Watermarking: Protecting the Document Further

• Protect PDF - Add a password so only intended recipients can open it
• Compress PDF - Reduce file size if the watermark has increased it
• Edit Metadata - Update the document title and author before distribution

Key Takeaways

• Use PDF Watermark to stamp text across every page - free, browser-based.
• Common use cases: CONFIDENTIAL, DRAFT, copyright notices, sample/preview marking.
• Watermarks are permanent - always keep an unwatermarked original.
• For image files, use Image Watermark instead.
• Pair with PDF password protection for maximum document security.