# Licence of PDFJS Express with NO connection to your server

**URL:** <https://pdfjs.community/t/licence-of-pdfjs-express-with-no-connection-to-your-server/1028>\
**Category:** Technical Support\
**Tags:** pdfjs-express\
**Created:** [October 5, 2021, 7:46pm UTC](https://pdfjs.community/t/licence-of-pdfjs-express-with-no-connection-to-your-server/1028 "2021-10-05T19:46:05Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![drevel](https://avatars.discourse-cdn.com/v4/letter/d/ee59a6/32.png) [@drevel](https://pdfjs.community/u/drevel)\
**Post date:** [October 5, 2021, 7:46pm UTC](https://pdfjs.community/t/licence-of-pdfjs-express-with-no-connection-to-your-server/1028/1 "2021-10-05T19:46:05Z")

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Hello !  
I’ve read through the documentation that we need a connection to your PDFTron website in order to make the commercial license work…  
It is not always possible to maintain a web connection to the PDFTron server just for this purpose…

In this example I see that the licence key is represented as a string text ! Then it makes me think that we can use the PDFJS Express library with no connection to your server ? Can you confirm ?

 ![image](https://canada1.discourse-cdn.com/flex031/uploads/pdfjscommunity/original/1X/51f0052f417a93f01d6335dbd340eb7fb8f4a656.png)

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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:** [October 5, 2021, 7:46pm UTC](https://pdfjs.community/t/licence-of-pdfjs-express-with-no-connection-to-your-server/1028/2 "2021-10-05T19:46:10Z")

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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:
- [Migrating from PDF.js Express to PDFTron - 3. Change initiation](https://pdfjs.express/documentation/learn-more/pdfjs-express-to-pdftron.8#3.-change-initiation)
- [Integrating with NPM - 2) Copy static files](https://pdfjs.express/documentation/get-started/npm#2)-copy-static-files)
- [Integrating Cordova with PDF.js Express - Prerequisites](https://pdfjs.express/documentation/get-started/cordova#prerequisites)

APIs:
- [Core - setCustomFontURL(url)](https://pdfjs.express/api/Core.html#.setCustomFontURL__anchor)
- [Core.Document - getDownloadLink( [options])](https://pdfjs.express/api/Core.Document.html#getDownloadLink__anchor)
- [Core.Annotations.RotationUtils - PathCustomAnnotationRotationMixin()](https://pdfjs.express/api/Core.Annotations.RotationUtils.html#PathCustomAnnotationRotationMixin__anchor)

Forums:
- [I’m need protection print and save PDF file on web](https://pdfjs.community/t/im-need-protection-print-and-save-pdf-file-on-web/60/2)
- [How to merge signature annotation with PDF document](https://pdfjs.community/t/how-to-merge-signature-annotation-with-pdf-document/558/2)
- [PDF.js Express Custom annotations](https://pdfjs.community/t/pdf-js-express-custom-annotations/332/1)

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**Author:** ![Logan](https://yyz1.discourse-cdn.com/flex031/user_avatar/pdfjs.community/logan/32/13_2.png) [@Logan](https://pdfjs.community/u/Logan)\
**Post date:** [October 5, 2021, 9:17pm UTC](https://pdfjs.community/t/licence-of-pdfjs-express-with-no-connection-to-your-server/1028/3 "2021-10-05T21:17:50Z")

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Hey there,

Unfortunately we do not support this use case, an internet connection is required to validate the license key.

If you need offline support, check out our sister product [PDFTron Webviewer](https://www.pdftron.com/webviewer/) - it does not require an internet connection.

Thanks!  
Logan

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**Author:** ![Logan](https://yyz1.discourse-cdn.com/flex031/user_avatar/pdfjs.community/logan/32/13_2.png) [@Logan](https://pdfjs.community/u/Logan)\
**Post date:** [October 5, 2021, 9:17pm UTC](https://pdfjs.community/t/licence-of-pdfjs-express-with-no-connection-to-your-server/1028/4 "2021-10-05T21:17:53Z")

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