How do I view RSS feeds as formatted XML?

Question

Is there a way to view rss feeds as formatted xml that doesn't involve messing with my browser's installation or writing my own tool?

Edit:

Preferably a way that works on an OS other than Windows.

Answer 1

Code Beautify's RSS Viewer is a tool to view RSS feed as XML as well as in HTML format: http://codebeautify.org/rssviewer/

Click on Load, enter RSS feed URL and it will output XML data on the left side and HTML data on the right side. This tool also supports to convert RSS XML to JSON.