XML Sitemap Validator
Updated September 2026
Validate pasted XML sitemap content for proper structure, HTTPS URLs, and duplicate detection. Free online sitemap validator — no URL fetching, paste your sitemap XML directly.
Paste your XML sitemap content below to validate its structure and check for errors.
Diagnosing web and network issues quickly is critical for site owners, developers, and SEO professionals. The Sitemap Validator delivers actionable data in seconds.
Validate pasted XML sitemap content for proper structure, HTTPS URLs, and duplicate detection. Free online sitemap validator — no URL fetching, paste your sitemap XML directly. Results are immediate — no waiting, no loading screens, no account required.
Who uses the Sitemap Validator?
- SEO professionals validating new sitemap files' structure before Google Search Console submission.
- Developers debugging sitemap generation scripts that produce malformed XML output.
- Webmasters doing a quick structural sanity check — root element, HTTPS usage, duplicates — on a sitemap before deeper investigation.
Common uses and search terms
The Sitemap Validator is frequently used for: sitemap, xml sitemap, sitemap validator. Whether you need a quick result or are working through a longer project, the tool handles all common variations without any configuration.
Why use Allio Tools's Sitemap Validator?
Everything runs locally in your browser. No data is sent to a server, logged, or stored anywhere. The tool is completely free with no usage limits, no premium tiers, and no account required. Available in 11 languages and optimised for all screen sizes, the Sitemap Validator works on desktop, tablet, and mobile with no app download needed.
See also:IP Address Lookup · Website Speed Test · DNS Lookup
How the Sitemap Validator works
Paste your sitemap's XML content into the text area — there's no live URL fetch, so copy the raw XML first.
Click Validate Sitemap to check it against 5 structural checks.
Review the pass/fail checklist: valid root element, entries present, all URLs HTTPS, no duplicate URLs, and <lastmod> presence count.
Scroll to see the first 10 URLs found, with a count of any remaining.
Tips & tricks
- There's no live URL fetch — paste the sitemap's actual XML content, not its URL.
- The tool checks presence of
tags but not their date format — a sitemap with malformed dates in every would still pass that check. - Sitemap index files (
wrapping ) are supported alongside regular sitemaps — the tool auto-detects which type you pasted. - Only the first 10 URLs are listed in the results even if your sitemap has thousands — the total count is shown separately in the stats line.
Frequently Asked Questions
Can I enter my sitemap's URL instead of pasting the XML?
No — this tool only validates XML you paste in directly. Fetch your sitemap's raw content first (visit the URL and copy the source, or use curl) and paste it into the text area.
What format must an XML sitemap follow?
Sitemaps must use the Sitemap Protocol 0.9 format: start with <?xml version="1.0" encoding="UTF-8"?>, wrap in <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">, and include <url> entries with required <loc> child tags.
Does this tool validate the date format of <lastmod>?
No — it only checks whether <lastmod> tags are present and counts how many entries have one. It doesn't verify the date values are valid ISO 8601 format; a malformed date string would still count as "present."
What is the maximum number of URLs in a sitemap?
Each sitemap file can contain up to 50,000 URLs and must be under 50 MB uncompressed. For larger sites, use a sitemap index file pointing to multiple sitemap files. This tool doesn't enforce or flag that limit itself — it just reports the total count found.
Should I include all pages or only canonical pages in my sitemap?
Include only canonical, indexable pages. Exclude: noindex pages, paginated pages (beyond page 1), URL parameter duplicates, private pages, and pages with canonical tags pointing elsewhere.
Is my data safe when using the Sitemap Validator?
Completely safe. The Sitemap Validator processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.
How current is the data returned by the Sitemap Validator?
The Sitemap Validator fetches live data in real time each time you run it. Results reflect the current state of the server or domain at the moment of the request.
Why does the Sitemap Validator sometimes return different results than other tools?
Results depend on the real-time state of the target server and DNS propagation, which can vary by geographic region and caching TTL. If you see inconsistencies, wait a few minutes and re-test — DNS changes can take up to 48 hours to propagate fully worldwide.
Works with ChatGPT, Claude, Cursor, GitHub Copilot, VS Code, Poe and more — 106+ tools, zero data collection.