Watermark PDF

Add Professional Watermarks to PDFs

Our free online PDF watermark tool allows you to add custom text watermarks to your PDF documents with full control over appearance and positioning. Whether you need to mark documents as drafts, confidential, or company property, our browser-based tool makes it simple to apply professional watermarks that appear across all pages. Simply upload your PDF, customize your watermark settings, and download the marked document.

Customizable Watermark Options

The tool offers comprehensive watermark customization. You can set any custom text up to 50 characters, adjust opacity from subtle 10% to solid 100%, control font size from 20px to 100px, and choose between centered or diagonal repeating patterns. These options let you create everything from barely-visible draft marks to bold, impossible-to-miss confidentiality notices.

Client-Side Processing for Privacy

When applying watermarks to sensitive documents, privacy is paramount. Our PDF watermark tool processes everything directly in your browser using JavaScript, meaning your documents never leave your device during the watermarking process. This ensures complete privacy for your content. Your files are processed entirely locally, with no data transmitted to external servers at any point.

Professional Watermark Applications

Watermarks serve many business and personal purposes. Mark internal documents as DRAFT before external sharing. Indicate CONFIDENTIAL or RESTRICTED status on sensitive materials. Add company names or logos to documents before distribution. Show status markers like REVIEWED, APPROVED, or FINAL. The diagonal repeating pattern is particularly effective for preventing easy removal while making the status immediately visible throughout the document.

Understanding Watermark Permanence

It's important to understand that watermarks are permanently embedded in the PDF. Once you save the watermarked version, the watermark becomes inseparable from the document content. This permanence is actually a security feature — unlike image overlays that can be removed, embedded watermarks cannot be deleted without access to the original unwatermarked file. Always keep a backup of your original file before watermarking.

Free and Accessible

Our PDF watermark tool is completely free with no watermarks, registration, or usage limits. Apply watermarks to as many PDFs as you need without paying fees or creating accounts. The watermarked output is yours to use for any purpose — business communications, document management, or content protection.