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Sitemap XML Checker

Before you submit a sitemap, paste it here: the mistakes that make search engines skip entries show up as a short list.

Paste a sitemap.xml or sitemap index below, or load the example.

How it works

  1. Open your sitemap.xml in the browser, select everything and copy it.
  2. Paste it into the box; a sitemap index (a list of sitemaps) works too.
  3. Read the counts, the hosts found and the list of problems, each with the address concerned.
  4. Fix the file at the source, generate it again and paste it back until the list is empty.

What people use it for

  • Before submitting

    Check a freshly generated sitemap for duplicates and relative links.

  • After a migration

    Spot the old host that is still in half of the entries.

  • Very large sites

    See at once whether a file passes the 50,000-address limit and must be split.

Questions

What limits does it check?
The sitemap protocol allows at most 50,000 URLs and 50 MB (52,428,800 bytes) uncompressed per file, and a sitemap index may list at most 50,000 sitemaps. A <loc> must be an absolute address of fewer than 2,048 characters, written with its protocol, and every address must be on the same host. Dates in <lastmod> follow the W3C format, for example 2026-10-19.
Is this a full XML validator?
No. It reads the tags it needs and reports what would trip a crawler. A file with a broken tag structure may still pass here, and the pasted text is limited to 10 MB, which is enough to count 50,000 addresses but not to check a file close to the 50 MB limit. The size shown is that of what you paste.
Does it fetch my site or check that the pages exist?
No. It never contacts any address, so it cannot tell whether a page answers or is blocked by robots.txt. It only checks the file itself, in your browser.