Question 1

What is an RSS feed?

Accepted Answer

RSS (Really Simple Syndication) is an XML format used to publish frequently updated content — blog posts, news, podcasts. Readers like Feedly, Inoreader and NetNewsWire subscribe to RSS feeds to get automatic updates.

Question 2

What does this validator check?

Accepted Answer

The validator parses the XML, detects RSS 2.0, RSS 1.0 (RDF) or Atom 1.0 format, validates required fields (title, link, description), counts items, parses pubDates and surfaces any malformed XML or missing fields.

Question 3

Can I validate feeds from any URL?

Accepted Answer

Yes — paste the feed URL (https://example.com/feed.xml) or paste the raw XML. The validator runs entirely in your browser using DOMParser; nothing is sent to any server.

Question 4

What's the difference between RSS and Atom?

Accepted Answer

RSS 2.0 (most common) uses . Atom 1.0 uses . Both serve the same purpose. Atom has stricter spec compliance and is used by GitHub, WordPress and many modern platforms.