# Watermark does not disappear after providing free license key

**URL:** https://pdfjs.community/t/watermark-does-not-disappear-after-providing-free-license-key/3411
**Category:** Technical Support
**Tags:** pdfjs-express
**Created:** [August 19, 2024, 11:44am UTC](https://pdfjs.community/t/watermark-does-not-disappear-after-providing-free-license-key/3411 "2024-08-19T11:44:36Z")
**Posts on this page:** 3
**Page:** 1

<div class="post-metadata">

### Author: ![saleh.asadi](https://avatars.discourse-cdn.com/v4/letter/s/8c91f0/32.png) [@saleh.asadi](https://pdfjs.community/u/saleh.asadi)
#### Post date: [August 19, 2024, 11:44am UTC](https://pdfjs.community/t/watermark-does-not-disappear-after-providing-free-license-key/3411/1 "2024-08-19T11:44:36Z")

</div>

**Which product are you using?**  
PDF.js Express Viewer

**8.7.4**

**Detailed description of issue**  
{I provided free license key that I generated in my account inside the code, but still watermark appears on viewer. also tried this steps too but no success:

1. generate new license
2. double check key
3. clear nginx cache}

**Expected behaviour**  
{I expect watermark disappear after providing the license key}

**Does your issue happen with every document, or just one?**  
{that’s happen all over the project, where I used pdf viewer}

**Code snippet**  
{let pdfViewerInstance = null;  
function pdfPreview(url) {  
if (pdfViewerInstance) {  
pdfViewerInstance.loadDocument(url);  
} else {  
WebViewer({  
path: `${base1}/assets/pdfjs`, // path to the PDF.js Express’lib’ folder on your server  
licenseKey: ‘sBdJ86MKDbmwKGn07PS7’,  
initialDoc: url, // You can also use documents on your server  
}, document.getElementById(‘viewer’))  
.then(instance =\> {  
const docViewer = instance.docViewer;  
const annotManager = instance.annotManager;  
pdfViewerInstance = instance;  
// call methods from instance, docViewer and annotManager as needed

```
            // you can also access major namespaces from the instance as follows:
            // const Tools = instance.Tools;
            // const Annotations = instance.Annotations;

            const {UI} = instance;

            UI.setHeaderItems((header) => {
                header.getHeader('default').push({
                    img: "icon-header-full-screen",
                    index: -1,
                    type: "actionButton",
                    element: 'fullScreenButton',
                    onClick: () => {
                        instance.UI.toggleFullScreen()
                    }
                });
            });
        });
}

```

}}

 ![image](https://canada1.discourse-cdn.com/flex031/uploads/pdfjscommunity/original/2X/4/4172f0e2a40ac8f4dd6cb82007abd69b5c7de106.png)

---

<div class="post-metadata">

### Author: ![darian.chen](https://avatars.discourse-cdn.com/v4/letter/d/3d9bf3/32.png) [@darian.chen](https://pdfjs.community/u/darian.chen)
#### Post date: [August 19, 2024, 2:31pm UTC](https://pdfjs.community/t/watermark-does-not-disappear-after-providing-free-license-key/3411/3 "2024-08-19T14:31:29Z")

</div>

Hello Saleh,

Have you added a domain to the license key? The watermark is only removed in production.

Please also make sure you are using` @pdftron/pdfjs-express-viewer` and not `@pdftron/pdfjs-express`.

---

<div class="post-metadata">

### Author: ![saleh.asadi](https://avatars.discourse-cdn.com/v4/letter/s/8c91f0/32.png) [@saleh.asadi](https://pdfjs.community/u/saleh.asadi)
#### Post date: [August 19, 2024, 3:05pm UTC](https://pdfjs.community/t/watermark-does-not-disappear-after-providing-free-license-key/3411/4 "2024-08-19T15:05:08Z")

</div>

Hello Darian, yes I added domain to license, seems issue was using pdfjs-express I downloaded another one was named pdfjs-express-view-only and issue is solved now but page looks different and annotation does not work in that. anyway the issue is solved and that satisfy what I needed, thanks for your help 💗