---
title: "Watermark PDF Free – Add Text Watermark to PDF — Nexvert"
description: "Stamp custom text watermarks across every page with opacity, rotation and color settings. Free, batch-applied, and processed in your browser."
url: https://nexvert.online/watermark-pdf/
---

# Watermark PDF Free

Stamp custom text watermarks across every page with opacity, rotation and color settings. Free, batch-applied, and processed in your browser.

## What is Watermark PDF?

Protect sensitive business proposals and contracts prior to distribution. Add diagonal or horizontal watermarks like "CONFIDENTIAL", "DRAFT", or your company name with custom opacity, color, and font sizing.

## How to use Watermark PDF

1. **Add your file or input** — Choose a supported file, drag it onto the upload area, or type/paste the data this tool works with.
2. **Adjust the options** — Pick the output format, quality, size or other settings the tool offers. Defaults work well for most files.
3. **Process and download** — Run the tool and save the result. Processing happens in your browser, so nothing is uploaded to a server.

## Frequently asked questions

### Can I customize the watermark transparency and angle?

Yes. You can adjust opacity from subtle 15% shading to bold stamps, set rotation angles (e.g. 45 degrees diagonal), and select custom text colors.

### Does the watermark appear above or below the document text?

The watermark is rendered as an overlay content stream with alpha blending, ensuring it remains visible across both text and background graphics without obscuring reading.

### Can someone easily remove a stamped PDF watermark?

The watermark is written directly into each page’s content stream operators, making it impossible to strip without specialized desktop PDF editor software.

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Source: https://nexvert.online/watermark-pdf/
HTML version: https://nexvert.online/watermark-pdf/