# Is it possible to use PDF.js Express with PDFTron Flattener and pdfDoc.removeSecurity()

**URL:** <https://pdfjs.community/t/is-it-possible-to-use-pdf-js-express-with-pdftron-flattener-and-pdfdoc-removesecurity/1063>\
**Category:** Technical Support\
**Created:** [October 11, 2021, 4:44am UTC](https://pdfjs.community/t/is-it-possible-to-use-pdf-js-express-with-pdftron-flattener-and-pdfdoc-removesecurity/1063 "2021-10-11T04:44:12Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![flkitover](https://avatars.discourse-cdn.com/v4/letter/f/34f0e0/32.png) [@flkitover](https://pdfjs.community/u/flkitover)\
**Post date:** [October 11, 2021, 4:44am UTC](https://pdfjs.community/t/is-it-possible-to-use-pdf-js-express-with-pdftron-flattener-and-pdfdoc-removesecurity/1063/1 "2021-10-11T04:44:12Z")

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We have a license for PDF.js Express, what would be the extra cost to use PDFTron Flattener and pdfDoc.removeSecurity() is this an option or do we have to buy a seperate license?

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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 11, 2021, 4:44am UTC](https://pdfjs.community/t/is-it-possible-to-use-pdf-js-express-with-pdftron-flattener-and-pdfdoc-removesecurity/1063/2 "2021-10-11T04:44:16Z")

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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)
- [XFDF format - In PDF.js Express Web Viewer](https://pdfjs.express/documentation/annotation/xfdf#in-pdf.js-express-web-viewer)
- [Saving a document as a blob](https://pdfjs.express/documentation/basic-operations/save-document/blob)

APIs:
- [Core.Document - getDownloadLink( [options])](https://pdfjs.express/api/Core.Document.html#getDownloadLink__anchor)
- [PDF.js Express Utilities](https://pdfjs.express/api/utils/index.html#__anchor)
- [ExpressUtils(optionsopt) - # async watermark(options) → {Promise.}](https://pdfjs.express/api/utils/ExpressUtils.html#watermark__anchor)

Forums:
- [Is it possible to apply css style to annotations?](https://pdfjs.community/t/is-it-possible-to-apply-css-style-to-annotations/87/3)
- [Blob with markup](https://pdfjs.community/t/blob-with-markup/47/12)
- [Annotations moving on downloaded pdf when opened in Abode Acrobat and BLUEBEAM](https://pdfjs.community/t/annotations-moving-on-downloaded-pdf-when-opened-in-abode-acrobat-and-bluebeam/1009/10)

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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 12, 2021, 2:51pm UTC](https://pdfjs.community/t/is-it-possible-to-use-pdf-js-express-with-pdftron-flattener-and-pdfdoc-removesecurity/1063/3 "2021-10-12T14:51:31Z")

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Hey there,

To use PDFTron functionality you would have to license PDFTron WebViewer - features cannot be mixed and matched unfortunately.

Express does not have the functionality to manipulate documents in any way.

If you do decide to upgrade to PDFTron, we we be happy to discount/refund you the price of your PDF.js Express license.

Thanks,  
Logan

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**Author:** ![flkitover](https://avatars.discourse-cdn.com/v4/letter/f/34f0e0/32.png) [@flkitover](https://pdfjs.community/u/flkitover)\
**Post date:** [October 12, 2021, 11:16pm UTC](https://pdfjs.community/t/is-it-possible-to-use-pdf-js-express-with-pdftron-flattener-and-pdfdoc-removesecurity/1063/4 "2021-10-12T23:16:35Z")

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Hi Logan

can you please advise how we go forward with getting a PDFTron license, we will need a PDFTron license with Flattener and PDFNet so we can call pdfDoc.removeSecurity().

Our PDF.js express account username is [hello@flkitover.com](mailto:hello@flkitover.com)

This is URGENT.

Thanks.

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<div class="post-metadata">

**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 14, 2021, 5:49pm UTC](https://pdfjs.community/t/is-it-possible-to-use-pdf-js-express-with-pdftron-flattener-and-pdfdoc-removesecurity/1063/5 "2021-10-14T17:49:23Z")

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Hey there,

You can contact our sales team here [https://www.pdftron.com/form/contact-sales](https://www.pdftron.com/form/contact-sales) for a quote.

I’ll let them know I sent you and that its urgent.

Thanks!  
Logan