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Burp Suite 2020.12 replaced the old Look and Feel classes with FlatLaf, an open source Look and Feel class which also supports 3rd party themes developed for the IntelliJ Platform.

This extension allows you to use these themes in Burp Suite, and includes a number of bundled themes to try.


Since Burp uses a number of custom GUI elements, PortSwigger extended the default Look and Feel classes with a number of additional properties. In order to try to make these blend in, I've tried to find standard elements who's colors can be used to replace the custom properties. Some themes might not have these properties, or might not fit the theme perfectly. If there are any elements which don't fit, please submit an issue on GitHub including the theme name, and a screenshot.

Author CoreyD97
Version 1.0.2
Last updated 08 March 2021

You can install BApps directly within Burp, via the BApp Store feature in the Burp Extender tool. You can also download them from here, for offline installation into Burp.

You can view the source code for this BApp by visiting our GitHub page.
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Please note that extensions are written by third party users of Burp, and PortSwigger Web Security makes no warranty about their quality or usefulness for any particular purpose.

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