# Pdfjs-express vs webviewer license key

**URL:** <https://pdfjs.community/t/pdfjs-express-vs-webviewer-license-key/1735>\
**Category:** Technical Support\
**Tags:** pdfjs-express\
**Created:** [June 2, 2022, 3:44pm UTC](https://pdfjs.community/t/pdfjs-express-vs-webviewer-license-key/1735 "2022-06-02T15:44:37Z")\
**Posts on this page:** 1\
**Showing post:** 1

<div class="post-metadata">

**Author:** ![mida](https://avatars.discourse-cdn.com/v4/letter/m/b2d939/32.png) [@mida](https://pdfjs.community/u/mida)\
**Post date:** [June 2, 2022, 3:44pm UTC](https://pdfjs.community/t/pdfjs-express-vs-webviewer-license-key/1735/1 "2022-06-02T15:44:38Z")

</div>

**PDF.js Express Version**  
@pdftron/webviewer 8.5.0

**Detailed description of issue**  
We need this feature

> **[Migrate from PDF.js Express to PDFTron webviewer | PDF.js Express SDK](https://pdfjs.express/documentation/learn-more/pdfjs-express-to-pdftron)**

so we are using @pdftron/webviewer

We have a license key for PDF.js Express Plus.

Watermarks are still present when used in a subdomain of the root domain that’s indicated in our license.

**Expected behaviour**

There should be no watermarks

**Does your issue happen with every document, or just one?**

Every document

**Code snippet**

```javascript
const instance = await WebViewer(
        {
          licenseKey: process.env.NEXT_PUBLIC_PDFEXPRESS_LICENSE_KEY,
          path: '/pdftron',
        },
        viewerRef.current,
      );

```

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_[View the full topic](https://pdfjs.community/t/pdfjs-express-vs-webviewer-license-key/1735)._