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Watermark, compress, merge, rotate and add page numbers to PDFs in a single workflow - 100% browser-based.
What is watermark pdf?
Watermarking PDFs is essential for marking drafts, protecting confidential documents, stamping copyright notices, and branding shared reports. PixlUtils embeds your watermark text diagonally across every page using pdf-lib - entirely in your browser. Adjust opacity so the watermark is visible without obscuring content. Free, no signup.
How it works
Three steps to add watermarks to your PDF - no software needed.
Upload your PDF
Drag and drop or click to select a PDF. Your file stays 100% on your device.
Configure your watermark
Enter watermark text, choose opacity, font size, and color. The watermark is applied diagonally to every page.
Download the watermarked PDF
Download instantly. The watermark is permanently embedded - no watermark on the UI, just on your document.
💡 Pro Tips
Use 20-30% opacity for subtle branding
A light watermark deters unauthorized use without making the document hard to read - ideal for client proposals and reports.
CONFIDENTIAL and DRAFT are the most common
Stamp internal documents before distributing - the watermark makes it immediately clear the document is not for public release.
Use your website URL for document traceability
Adding your URL as a watermark means any leaked copy can be traced back to its origin.
Combine with page numbers for professional output
Use the Add Page Numbers tool after watermarking for fully branded, numbered documents.
Frequently Asked Questions