What are the sitemap size limits?

A single sitemap can list up to 50,000 URLs and must be no larger than 50 MB (52,428,800 bytes) uncompressed. Larger sites should split URLs across several sitemaps and list them in a sitemap index.

What lastmod format is valid?

lastmod must use W3C Datetime, such as 2026-10-02 or 2026-10-02T14:30:00+05:30. Formats like 02/10/2026 are invalid.

Do changefreq and priority matter for Google?

Google says it ignores changefreq and priority, but other search engines may read them, so invalid values are still reported as errors.

Why must loc URLs be absolute?

The protocol requires full URLs including https:// and the host. Relative paths like /about are invalid.

Is my sitemap uploaded anywhere?

No. The XML is parsed with your browser's built-in DOMParser and never leaves your device.

Does it validate image, video and news extensions?

Extension tags (image:, video:, news:, xhtml:) are accepted without errors; the tool focuses on the core sitemap protocol rules.

What is XML Sitemap Validator?

XML Sitemap Validator is a free online tool that lets you check xml sitemaps for errors, duplicates and limits. Validate an XML sitemap or sitemap index against the sitemaps.org protocol: well-formed XML, correct namespace, absolute URLs, duplicates, W3C lastmod dates, valid changefreq and priority values, and the 50,000 URL / 50 MB limits — with line numbers for each issue. It runs entirely in your browser — fast, private, and completely free.

How do I use Sitemap Validator online for free?

Using Sitemap Validator is simple: 1) Navigate to the XML Sitemap Validator page on MyToolsHub — no sign-up or installation needed. 2) Click the upload area or drag and drop your file. Supported formats: .xml, .gz. 3) Adjust any available settings to match your requirements. 4) Click the process button. Your result is ready instantly — download it with one click. No registration or software installation is needed.

Is Sitemap Validator free to use?

Yes, XML Sitemap Validator is 100% free with no hidden costs, no subscription, and no sign-up required. All features are available to every user at no charge.

Is my data safe when using Sitemap Validator?

Absolutely. XML Sitemap Validator processes all data directly in your browser. Your files and text never leave your device or get sent to any server. Your privacy is fully protected.

What is the best xml sitemap validator online tool online?

MyToolsHub's XML Sitemap Validator is one of the best free xml sitemap validator online tools available online. It requires no installation, works on all devices, and delivers instant results without any sign-up.

Can I use sitemap checker free without registration?

Yes. You can use Sitemap Validator — and all 100+ tools on MyToolsHub — completely without creating an account. Just open the tool and start working immediately.

What file formats does Sitemap Validator support?

Sitemap Validator supports the following input formats: .xml, .gz. No conversion or pre-processing is needed.

Do I need to install anything to use validate sitemap xml?

No installation is required. XML Sitemap Validator is a web-based tool that runs directly in your browser on any device — Windows, Mac, Linux, Android, or iOS.

XML Sitemap Validator

Validate an XML sitemap or sitemap index against the sitemaps.org protocol: well-formed XML, correct namespace, absolute <loc> URLs, duplicates, W3C lastmod dates, valid changefreq and priority values, and the 50,000 URL / 50 MB limits — with line numbers for each issue.