---
title: "JavaScript PDF watermark API for your files"
canonical_url: "https://www.nutrient.io/guides/document-converter/document-converter-services/watermark/javascript/"
md_url: "https://www.nutrient.io/guides/document-converter/document-converter-services/watermark/javascript.md"
last_updated: "2026-06-08T15:36:24.915Z"
description: "Add dynamic text and images as watermarks in PDF documents using our simple REST API. Start your free trial today!"
---

# Add watermarks to your documents

Add text and image watermarks to PDF or Office files through our REST API. Dynamically add dates, times, and page numbers to the header and footer of your documents. Insert lines, rectangles, ellipses, barcodes, RTF files, images, and PDFs into your document. Apply multiple watermarks to the same page or to a range of pages (odd, even, portrait, or landscape). No server setup is required — simply start your free trial or sign up for an account to integrate watermarking capabilities into your application.

## Code Samples: Adding Watermarks Using JavaScript

Explore our code samples to learn how you can add watermarks to documents in your application or workflow.

1. [Add Watermarks to PDFs in JavaScript](https://github.com/Muhimbi/PDF-Converter-Services-Online/tree/master/clients/v1/javascript/samples/watermarking)

---

## Related pages

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- [Add watermarks to your documents](/guides/document-converter/document-converter-services/watermark/java.md)
- [C# Watermark Server](/guides/document-converter/document-converter-services/watermark/csharp-server.md)
- [Add watermarks to PDFs using PHP API](/guides/document-converter/document-converter-services/watermark/php.md)