# Watermark PDF — Free, In Browser

Add a diagonal text watermark to every page. 100% in your browser — free, no sign-up, no upload.

## Watermark every page

Add a diagonal text watermark (e.g. CONFIDENTIAL or DRAFT) across all pages, with adjustable opacity and size. Runs in your browser.

## How to

1. Choose your PDF.
2. Type watermark text and set opacity.
3. Download the watermarked PDF.

## FAQ

**Is it free?**

Yes, completely free with no file limits.

**Is my data private?**

Yes — this tool runs entirely in your browser. Your files and text are never uploaded.


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