# Watermark a PDF — diagonal text stamp, no upload

> Stamp diagonal text across chosen PDF pages with control over size, opacity, and rotation. Runs in your browser — the PDF is never uploaded.

Stamp diagonal text — DRAFT, CONFIDENTIAL, your name — across a range of pages, with control over size, opacity, and rotation. The stamp is applied locally, so the file isn't uploaded.

A watermark marks intent — that a draft isn't final, that a copy is confidential, or that a document belongs to you. This tool stamps diagonal text across the pages you choose, positioned identically on each so a multi-page document reads consistently.

Because it's an overlay, it changes how the file looks without altering the underlying text. If you instead need to permanently remove content, use Redact; to add page position labels, use Page numbers.

## How to

1. **Add the PDF.** Drop your PDF and pick the page range to stamp.
2. **Set the text.** Type the watermark and adjust size, opacity, and angle on the live preview.
3. **Download.** Export the watermarked PDF.

## FAQ

### Can I control opacity and angle?

Yes. A live overlay lets you set the text size, opacity, and rotation, and preview it across pages before exporting.

### Is a watermark the same as redaction?

No — a watermark is a visible overlay, not a way to hide content. To remove sensitive information, use Redact instead.

### Is my PDF uploaded to watermark it?

No. The stamp is drawn onto the pages with pdf-lib in your browser, so the document stays on your device.


## Related tools

- [Redact](https://www.safepaper.app/docs/redact)
- [Page #](https://www.safepaper.app/docs/page-numbers)
- [Header/footer](https://www.safepaper.app/docs/header-footer)
- [Sign](https://www.safepaper.app/docs/sign-pdf)

---

Canonical HTML: https://www.safepaper.app/docs/watermark
Markdown: https://www.safepaper.app/docs/watermark.md

There is no upload endpoint — your files are processed in this browser tab. Open your network tab and check.