What are the hard limits for sitemap.xml?

Per the sitemaps.org spec (and enforced by Google and Bing): maximum 50,000 URLs per file, maximum 50 MB uncompressed, and each URL must be under 2,048 bytes. If you exceed these limits, split the sitemap and reference the parts from a sitemap index file.

What is a sitemap index?

A sitemap index is a sitemap that lists other sitemaps instead of URLs. It uses as the root element and entries instead of entries. This tool validates both formats.

What is the W3C date format for ?

W3C date format is YYYY-MM-DD (e.g. 2026-05-01) or the full ISO 8601 datetime with timezone (e.g. 2026-05-01T12:00:00+00:00). Google accepts both. Avoid formats like "May 1, 2026" or "01/05/2026" — they are not valid and will be ignored.

is a hint to crawlers about the relative importance of pages within your site. It does not directly affect ranking in search results. Google has stated it largely ignores priority. is similarly advisory. The most useful signal is — keep it accurate and Google will recrawl changed pages faster.

Should I include every page in my sitemap?

Include pages you want indexed. Exclude: pages with noindex meta tags, paginated pages (use canonical instead), duplicate content, admin/login pages, and pages blocked by robots.txt. A smaller, high-quality sitemap is better than a large one with low-value URLs.

Sitemap.xml Validator

Validate sitemap.xml files against the sitemaps.org spec. Catches invalid URLs, oversized files, malformed dates, and the silent 50,000-URL limit.

sitemap.xml

About Sitemap.xml Validator

Validate sitemap.xml files against the sitemaps.org specification. Catches invalid<loc> URLs, malformed <lastmod> dates, out-of-range<priority> values, duplicate entries, and the silent 50,000-URL and 50 MB limits that cause Google to silently stop processing your sitemap.

Pipeline

robots.txt Validator — check that your sitemap URL is referenced in robots.txt.
Meta Tag Generator — generate SEO meta tags for the pages in your sitemap.

Frequently asked

What are the hard limits for sitemap.xml?: Per the sitemaps.org spec (and enforced by Google and Bing): maximum 50,000 URLs per file, maximum 50 MB uncompressed, and each <loc> URL must be under 2,048 bytes. If you exceed these limits, split the sitemap and reference the parts from a sitemap index file.
What is a sitemap index?: A sitemap index is a sitemap that lists other sitemaps instead of URLs. It uses <sitemapindex> as the root element and <sitemap> entries instead of <url> entries. This tool validates both formats.
What is the W3C date format for <lastmod>?: W3C date format is YYYY-MM-DD (e.g. 2026-05-01) or the full ISO 8601 datetime with timezone (e.g. 2026-05-01T12:00:00+00:00). Google accepts both. Avoid formats like "May 1, 2026" or "01/05/2026" — they are not valid and will be ignored.
Does <priority> affect ranking?: <priority> is a hint to crawlers about the relative importance of pages within your site. It does not directly affect ranking in search results. Google has stated it largely ignores priority. <changefreq> is similarly advisory. The most useful signal is <lastmod> — keep it accurate and Google will recrawl changed pages faster.
Should I include every page in my sitemap?: Include pages you want indexed. Exclude: pages with noindex meta tags, paginated pages (use canonical instead), duplicate content, admin/login pages, and pages blocked by robots.txt. A smaller, high-quality sitemap is better than a large one with low-value URLs.

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