ToolkitBook
Paste your sitemap.xml and click Check to scan for broken markup, missing tags, bad URLs, wrong date formats, duplicate entries, and more. Each issue links to its line number and shows the code at that line so you can jump right to it. The editor highlights errors in red and warnings in yellow.
Prefer to upload a file? Sitemap XML File Checker
Paste your sitemap.xml content into the editor and click Check. The scanner reads the XML and lists every issue, each with its line number, the code on that line, and a brief note on what is wrong. Fix the problem in the editor and click Check again to confirm.
It catches XML syntax errors, wrong or missing namespace declarations, <url> entries without a <loc> tag, relative or malformed URLs, duplicate <loc> values, badly formatted <lastmod> dates, out-of-range <priority> values, invalid <changefreq> entries, unescaped & characters, and URL count or file size limits.
Errors break XML parsing or violate the sitemap protocol, so search engines may not read the file. Warnings flag practices that hurt crawl efficiency but do not stop processing.
An XML parser that hits a structural error will misread everything after it. Fix the first error on the list, then re-check. Later errors often clear up once the root cause is gone.
No. All checking runs in your browser. Your sitemap content stays on your machine and is never uploaded anywhere.