# I have free license key (pdf express viewer), but still showing watermark

**URL:** <https://pdfjs.community/t/i-have-free-license-key-pdf-express-viewer-but-still-showing-watermark/1601>\
**Category:** Technical Support\
**Tags:** pdfjs-express\
**Created:** [April 18, 2022, 2:42pm UTC](https://pdfjs.community/t/i-have-free-license-key-pdf-express-viewer-but-still-showing-watermark/1601 "2022-04-18T14:42:47Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![system](https://canada1.discourse-cdn.com/flex031/uploads/pdfjscommunity/original/1X/ffbcd25c7d423db8d5acd5db201c272f4db306dd.png) [@system](https://pdfjs.community/u/system)\
**Post date:** [April 18, 2022, 2:42pm UTC](https://pdfjs.community/t/i-have-free-license-key-pdf-express-viewer-but-still-showing-watermark/1601/3 "2022-04-18T14:42:52Z")

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**Hello, I’m Ron, an automated tech support bot 🤖**

While you wait for one of our customer support representatives to get back to you, please check out some of these documentation pages:

Guides:
- [Integrating PDF.js Express Viewer with NPM](https://pdfjs.express/documentation/get-started-viewer/npm)
- [Integrating PDF.js Express Viewer into an existing Angular project - Prerequisites](https://pdfjs.express/documentation/get-started-viewer/angular/exist-project#prerequisites)
- [PDF.js Express Viewer Overview - What is PDF.js Express Viewer?](https://pdfjs.express/documentation/get-started-viewer#what-is-pdf.js-express-viewer?)

APIs:
- [Core - preloadPDFWorker(pdfBackendType, workerHandlers)](https://pdfjs.express/api/Core.html#.preloadPDFWorker__anchor)
- [PDF.js Express Utilities](https://pdfjs.express/api/utils/index.html#__anchor)
- [Core.AnnotationManager - importAnnotationCommand(xfdfString)](https://pdfjs.express/api/Core.AnnotationManager.html#importAnnotationCommand__anchor)

Forums:
- [I have license, but still show watermark](https://pdfjs.community/t/i-have-license-but-still-show-watermark/1078/1)
- [Can I remove pdfjs.express watermark from viewer?](https://pdfjs.community/t/can-i-remove-pdfjs-express-watermark-from-viewer/1073/4)
- [Can I remove watermark from PDF.js viewer (free version)?](https://pdfjs.community/t/can-i-remove-watermark-from-pdf-js-viewer-free-version/1166/1)

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