# Error when loading xfdf annotations

**URL:** <https://pdfjs.community/t/error-when-loading-xfdf-annotations/1380>\
**Category:** Technical Support\
**Created:** [February 14, 2022, 6:22pm UTC](https://pdfjs.community/t/error-when-loading-xfdf-annotations/1380 "2022-02-14T18:22:59Z")\
**Posts on this page:** 1\
**Showing post:** 3

<div class="post-metadata">

**Author:** ![system](https://canada1.discourse-cdn.com/flex031/uploads/pdfjscommunity/original/1X/ffbcd25c7d423db8d5acd5db201c272f4db306dd.png) [@system](https://pdfjs.community/u/system)\
**Post date:** [February 14, 2022, 6:23pm UTC](https://pdfjs.community/t/error-when-loading-xfdf-annotations/1380/3 "2022-02-14T18:23:04Z")

</div>

**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:
- [XFDF format - In PDF.js Express Web Viewer](https://pdfjs.express/documentation/annotation/xfdf#in-pdf.js-express-web-viewer)
- [Customize display authors for annotations - Map a userId to a Display Author](https://pdfjs.express/documentation/annotation/display-authors#map-a-userid-to-a-display-author)
- [Creating custom annotations for your viewer - Saving the custom annotation](https://pdfjs.express/documentation/annotation/custom-annotations.8#saving-the-custom-annotation)

APIs:
- [ExpressUtils(optionsopt) - # async set() → {Promise.}](https://pdfjs.express/api/utils/ExpressUtils.html#set__anchor)
- [Core.Tools.FreeHandHighlightCreateTool - complete()](https://pdfjs.express/api/Core.Tools.FreeHandHighlightCreateTool.html#complete__anchor)
- [UndefinedWebViewer(options, viewerElement)](https://pdfjs.express/api/global.html#WebViewer__anchor)

Forums:
- [Merging XFDF using the Express REST API length exceeded error](https://pdfjs.community/t/merging-xfdf-using-the-express-rest-api-length-exceeded-error/185/5)
- [Do you have any example from PDF to database](https://pdfjs.community/t/do-you-have-any-example-from-pdf-to-database/196/2)
- [Unable to save the transparency to fillColor](https://pdfjs.community/t/unable-to-save-the-transparency-to-fillcolor/242/1)

---

_[View the full topic](https://pdfjs.community/t/error-when-loading-xfdf-annotations/1380)._