Hxd Plugins ((install)) Online

HxD does not natively support a complex plugin architecture (like IDA Pro or x64dbg), but it supports to automate tasks. This creates a de-facto plugin ecosystem.

: Plugins can be written in several languages, including Delphi, C, C++, and PureBasic . hxd plugins

If the built-in features aren't enough, the best way to "plugin" to HxD is to write a script that interacts with the file. HxD does not natively support a complex plugin