rssrssrssrss is designed to combine multiple RSS feeds into one unified feed.

Here is a summary of its main features and functionalities:

Core Functionality

• Feed Merging: The primary function is to combine multiple RSS feeds into one unified feed.

• Interleaving Content: This simple tool specifically addresses the need to interleave multiple RSS feeds, which the sources note "relatively few things do a great job of".

Input and Editing

• Adding Feeds: Users can add RSS feeds by entering one RSS feed URL per line in the provided input box.

• Editing Existing Feeds: Users can also paste an existing merged feed URL to edit it.

Output and Security

• Permalink Generation: Once the feeds are added and reviewed, the user can generate a permalink.

• Encoding: This permalink is a base-64 encoded URL of the feeds. The source mentions this encoding helps ensure "no real worry about bitrot".

User Experience and Technical Details

• Preview: The service provides a preview of the merged feed so users can ensure the output is what they want.

• Open Source: The tool is open source.

• Creator: It was built by Buttondown.

• Alternative Name: Users may also refer to it as "rss4".