Validating with the W3C

The W3C has several useful validation services. Most are for the standards they have developed, but there is also one for web feeds (Atom / RSS). These are the ones I know of.

  • (X)HTML / MathML (plus some favelets you can add to your bookmarks)
  • Link Checker (checks for broken links)
  • CSS (Cascading Style Sheets)
  • Feeds (Atom / RSS)
  • P3P (Platform for Privacy Preferences)
  • RDF (Resource Description Framework)
  • XSV (XML Schema Validator)
  • SVG (Scalable Vector Graphics)

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