Sitemap Lastmod Checker

Sitemap Lastmod Checker produces missing, future, ancient, and unparseable lastmod values. Each stored page is classified. No lastmod is missing. A date after today is future. A date more than two years before today is ancient. A value that is not a date is unparseable. You can paste XML into the box, or you can enter a public sitemap URL and let the server fetch it. A pasted urlset is parsed on the server without a second copy of the parser in the browser. The form stays near the top of the page, under the single title. (Sitemap Lastmod Checker, guide 1.)

Use https://example.com/sitemap.xml as the file you are checking and https://example.com/blog/launch as a page address you expect to see or not see, depending on the job. A date-only value such as 2024-01-01 is future only when that calendar day is still ahead. The word soon is unparseable, not missing. If the file is a sitemap index, child documents such as https://example.com/blog/old-post are fetched only when you supplied the index URL, only while the depth is within 2, and only until 20 child sitemap requests have been made. (Sitemap Lastmod Checker, guide 2.)

Sitemap Lastmod Checker shares one fetcher with the other sitemap tools. The fetcher allows http and https only. It rejects file, gopher, and data URLs, then blocks localhost, loopback, link-local, private ranges, CGNAT space, and the cloud metadata address before it opens a socket. DNS answers are checked before the connection, and a redirect is checked again. A redirect loop is reported instead of being followed forever. Three hops is the maximum. (Sitemap Lastmod Checker, guide 3.)

Large files are cut at 5 MB, and the stored page list stops at 5,000 URLs. Gzip responses and addresses that end in .gz are decompressed before parsing. A DOCTYPE or an entity declaration is rejected so the parser cannot expand an external entity. An HTML document or a Cloudflare challenge body is reported as not a sitemap. The raw response body is not written to the log. (Sitemap Lastmod Checker, guide 4.)

When a URL must be fetched, the page sends the job to the server and shows a short progress line while it polls. Small pastes return immediately with the same result shape: source URL, index or urlset, child sitemaps, page rows, errors, duplicates, redirect hops, status, truncated flag, and counts. Repeat fetches of the same normalized URL can reuse a finished parse for 10 minutes. Jobs sit in a file folder so more than one server process can see them, and they expire after 30 minutes. (Sitemap Lastmod Checker, guide 5.)

Deleting every ancient lastmod because the page is old. An old date can be honest. A future date usually means the clock or the template is wrong. After you read that distinction, look at the severity of any finding. An error means the document or the fetch failed the check this page is responsible for. A warning, such as a duplicate loc or a truncated file, means the rest of the result is still usable. A note explains a cap, a paste that did not download child files, or a sample crawl. (Sitemap Lastmod Checker, guide 6.)

A concrete pass through Sitemap Lastmod Checker starts with https://example.com/sitemap.xml. If that address is an index whose first child is https://example.com/blog/old-post, the file list and the page list answer different questions. The page address https://example.com/blog/launch belongs in the page list only when a urlset contains it. Keep the two lists apart when you copy them into a spreadsheet or a ticket. (Sitemap Lastmod Checker, guide 7.)

The result panel uses the same dark block as the other tools on this site. Copy is there when a text result is useful. A download button appears only for a file this page actually builds, such as CSV, XLSX, XML, or llms.txt. Sitemap Lastmod Checker does not add a second title to the page, and it does not restyle the tools around it. (Sitemap Lastmod Checker, guide 8.)

Take Sitemap Lastmod Checker as one step. The next page in this set is Sitemap Audit, which answers a different question about the same sitemap. Sitemap Validator is the other close check. Finish the reading on this page before you switch, so you do not mix missing, future, ancient, and unparseable lastmod values with a different report. (Sitemap Lastmod Checker, guide 9.)