Fix WordPress RSS Feed Errors (Step-by-Step Guide)

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RSS feeds allow users to subscribe to your blog using applications like Feedly. However, because RSS feeds use the XML markup language, even a small error can render the feed unreadable. This means that users won't be able to see your new content in their news feeds.

In this guide, we will help you quickly fix RSS feed errors in WordPress. We will also discuss what causes these errors and how to avoid them in the future.


WordPress outputs RSS feeds in a strict XML markup language. A missing line break or an extra tab can break the RSS feed in your WordPress blog .

Warning: Cannot modify header information - headers list of denmark cell phone number already sent by (output started at /home/username/example.com/wp-content/themes/twentysixteen/functions.php:433) in /home/username/example.com/wp-includes/pluggable.php on line 1228
If you use FeedBurner or other social sharing automation applications like IFTTT , the error messages may look different. These errors not only affect your feed, but can also disrupt services that rely on your WordPress RSS feed to update content for subscribers.

Now let's see what causes these RSS feed errors and how to fix them. You can use these quick links to jump to a specific step:

Even the smallest formatting error can disrupt your RSS feed. Fortunately, there are free online tools that can help you detect these errors, such as the W3C Feed Validator .

The first step is to find the URL of your RSS feed. In most cases, your WordPress RSS feed URL will be in the following format: rwebsite.comwith your actual website address.

Then visit the W3C Feed Validation Tool using the link above. Simply paste the URL of your RSS feed into the field provided and click “Check”.