Combine multiple RSS feeds into one unified feed
Enter one RSS feed URL per line
Paste an existing merged feed URL to edit it
Put the URLs of RSS feeds you want to combine in the box above; idly (or passionately) browse the preview to make sure it's what you want; hit the button to get a permalink (that's a base-64 encoded URL of the feeds, so no real worry about bitrot).
Lots of things take RSS. Relatively few things do a great job of interleaving multiple RSS feeds. This is a simple tool to do that.
If you insist.
Your friends at Buttondown, and they even made it open source.
Add RSS feed URLs to see a preview of your merged feed
Try a sample bundle:
Add RSS feed URLs to see a preview of your merged feed
Try a sample bundle: