How to Add a Watermark to a PDF for Free

August 8, 2026

A watermark is a semi-transparent mark laid across your document's pages. It tells everyone who sees the file what state it's in — DRAFT before approval, CONFIDENTIAL before sharing, COPY for submissions — and it quietly discourages misuse of your work. Adding one to a PDF takes less than a minute, free, and without leaving your browser.

What Do You Want the Watermark to Say?

Think about who will see the document and what message matters: DRAFT, CONFIDENTIAL, FINAL, SAMPLE, or simply your company or client name. Keep it short and uppercase for maximum legibility at low opacity. Our tool renders watermark text with your system fonts, so it supports any language your browser does — including Chinese, Japanese, and other scripts.

How to Add a Text Watermark

Our Add Watermark tool is a pure text watermarker — no upload required, everything runs in your browser:

1. Open the Add Watermark tool.
2. Upload your PDF (up to 50 MB).
3. Type your watermark text, then customize: color, font size, opacity, and rotation.
4. Choose the placement — or enable tiled mode to repeat the mark across the whole page.
5. Click Apply Watermark, then download the watermarked PDF.

The watermark is drawn as a high-resolution overlay; the original page content is never modified, so removing it later isn't possible by simply hiding an object — which is precisely the point of a watermark.

Watermark Best Practices

• Opacity around 30-50%. Too light and the mark disappears in print; too heavy and the document becomes hard to read. Semi-transparency is the watermark's signature look for a reason.
• Diagonal for full pages. A diagonal band crosses the widest area of the page and survives cropping attempts better than a centered horizontal line.
• Tile for maximum coverage. For documents likely to be screenshot or screen-shared, tiled watermarks make it impractical to crop the mark out.
• Corner for brand. If the goal is gentle branding rather than protection, a small mark in the corner keeps the document looking professional.

Text Only? What About Logos and Images?

The watermark tool is text-based by design — text stays crisp at any zoom and can't be distorted. If you need to place a logo or other image on a document, that's a different job: use the Image Stamp tool to position a logo at a specific spot, or learn how to sign a PDF with your signature image. For legal or financial documents, consider using both: a tiled CONFIDENTIAL watermark plus a discreet logo in the header.

Try It Now

Protect your next document with the free Add Watermark tool — no upload, no signup, and your file never leaves your device.