This small whitespace, often caused by themes or plugins, breaks XML feeds and causes browser or validator errors like:
XML declaration allowed only at the start of the document
With this plugin activated, the output buffer is cleaned before anything is sent to the browser—ensuring your sitemaps and RSS feeds are valid and readable by search engines like Google.
✅ Works with:
- Rank Math
- Yoast SEO
- Other Seo Tools
- All themes and plugins
No settings page. No configuration. Just activate and forget.
Features
- Automatically removes leading whitespace from XML output
- Fixes “XML declaration not at start” errors
- Works with Rank Math, Yoast, and other sitemap plugins
- Compatible with any WordPress theme or hosting
- Runs silently in the background
Does this plugin modify any content or database?
No. It only buffers and cleans output whitespace before it reaches the browser. It doesn’t store or alter data.
Will this conflict with my SEO plugin?
Not at all. It is compatible with Rank Math, Yoast SEO, All in One SEO, SEOPress, and others.
What if I still see the error after activation?
Ensure no theme or plugin is sending output (like
echo,var_dump(), or spaces) before the plugin loads. Also, clear any caching and test again.
Does it have any settings page?
No. It’s designed to be automatic. Activate and you’re done.
