RSS Validator
This service tests the validity of an RSS 2.0 feed, checking to see that it follows the rules of the RSS specification. For advice from the RSS Advisory Board on how to implement RSS and handle issues such as enclosures and HTML encoding, read the RSS Best Practices Profile. This checker is also a validator of Atom and RSS 1.0 feeds.
Use this tester regularly to ensure that your RSS feed continues to work well in the wide audience of RSS readers, podcast clients and other software that supports the format.
Source: http://www.segelflug.de/vereine/welt2000/content/de/news/updates.xml
<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta http-equiv="x-ua-compatible" content="ie=edge"><meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"><title>404 Not Found</title><link rel="stylesheet" href="/error_docs/styles.css"></head><body><div class="page"><div class="main"><h1>Server Error</h1><div class="error-code">404</div><h2>Page Not Found</h2><p class="lead">This page either doesn't exist, or it moved somewhere else.</p><hr/><p>That's what you can do</p><div class="help-actions"><a href="javascript:location.reload();">Reload Page</a><a href="javascript:history.back();">Back to Previous Page</a><a href="/">Home Page</a></div></div></div></body></html>
Software created by Sam Ruby, Mark Pilgrim, Joseph Walton and Phil Ringnalda
