OPML file editor

General
1

Now that many of us have moved off social media, a lot of us are using RSS feeds. I think an OPML file editor is going to be crucial in the long term.

Functionalities I’m looking for:

  • constraining edits to only within certain folders/tags
  • batch-deleting feeds based on domain name.
  • a good GUI, hopefully
  • And more!

Can anyone recommend a private OPML editor? Ideally, offline and open-source. Downloadable offline websites work too.