Free RSS Validators
Use this list of free RSS validators to validate your RSS feed :
Podbase: For podcast feeds. Podbase will check your URL, make sure your XML is well formed, and whether it is iTunes-compatible. It will also check for things like your cover art being in iTunes compliance, correct category, correct summary, and more.
Cast Feed Validator: For podcast feeds. This validates your feed, checks the main image, as well as media files, while letting you visualize your podcast RSS feed.
For more information visit: https://rss.com/blog/rss-feed-validators/
We suggest you check out our video explaining this process in more detail: