Validate:
This is the W3C Feed Validation Service, a free service that checks the syntax of Atom or RSS feeds. The Markup Validation Service is also available if you wish to validate regular Web pages.
Validate an RSS or Atom Feed
Recent Updates
- 2005-11-21: Launch of the W3C Feed Validation Service
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Launch of the W3C Feed Validation Service, a free syntax checker for feeds in formats such as RSS and Atom. Building upon the open source software feedvalidator, this service also acts as a Web Service with an open API.
These are the most recent major changes to this service. See "What's New" for more details.