- FEED Validator (which by the way is providing an extensive list of errors and hints on how to solve them
- RSS Validator
- W3C FEED Validation Service
I am wondering if there are any desktop apps that do this, or some Ruby/Python scripts for doing this. Any hints?
Update: I have found another RSS 1.0 online validator: Redland RSS 1.0 Validator and Viewer, but not yet what I am looking for.