Sitemap Validator

Invalid syntax

The tool cannot process input that already contains broken syntax or malformed structure.

Fix: Check the pasted content first and correct the syntax error closest to the reported failure point.

Incomplete pasted input

Partial snippets often fail when opening and closing characters are missing.

Fix: Paste the full block or file so the tool can evaluate the complete structure.

Wrong content type

Formatting or validating the wrong format produces misleading errors.

Fix: Make sure the content matches the tool you are using before processing it.

Does Sitemap Validator handle JavaScript-rendered pages?

Sitemap Validator fetches the raw HTML served to a crawler, which is what search engines index for the first pass. If your site relies on client-side rendering, the tool shows you exactly what Googlebot's initial render sees before it runs JavaScript.

What User-Agent does Sitemap Validator send?

Sitemap Validator sends a User-Agent string that identifies itself honestly (DevFox bot) rather than impersonating Googlebot — spoofing UAs can get a site's access flagged. If a page blocks non-browser UAs, you'll see the block clearly reflected in the output.

Can Sitemap Validator check password-protected pages?

No. Sitemap Validator only makes anonymous public requests — it can't log in or carry session cookies. For auth-protected pages, use a headless browser in your own environment.

Does Sitemap Validator respect my robots.txt?

Yes. Sitemap Validator fetches and parses robots.txt before crawling a site and skips disallowed URLs by default. You can toggle off the check if you're auditing your own site and want to see every status code.

How often is the data in Sitemap Validator refreshed?

Sitemap Validator fetches live data on every request — there's no cached result between sessions. That means you always see the current state of a page, at the cost of a small delay while requests complete.