This tool detects XML Fast Infoset encoded HTTP requests in Burp based on the Content-Type header (xml/fastinfoset). Once the encoding is detected, it un-gzips the requests and decodes it to present a text-based readable user-friendly version. After a request has been edited, the plugin converts it back to the original encoding, allowing requests to be modified on the fly.
For more information see the accompanying blog post
This plugin uses a decoding function from Lu Jun's code.
Download JAR file from dist directory and load it through Burp Extender module. A new tab in Burp Proxy and Burp Repeater appears for any XML Fast Infoset encoded requests.