Client-Side UtilityLocal memory execution • Zero server telemetry
XML Sitemap Validator & Schema Checker
Validate XML sitemaps against official Sitemaps Protocol 0.9 standards. Detect broken URLs, missing tags, invalid lastmod dates, duplicate URLs, and incorrect priority values.
IMaintained by Infrastructure & SEO Desk
Published
Sitemap Input Mode
Quick test:
Ready to validate XML sitemap
Enter a live sitemap URL or paste raw XML markup above to audit compliance against official sitemaps.org Protocol 0.9 standards.
IMaintained by Infrastructure & SEO Desk
Published
Calculation Methodology & Formula
Parses and audits XML sitemaps per sitemaps.org specification, validating <urlset>, <sitemapindex>, ISO 8601 timestamps, W3C datetime conventions, and 0.0 - 1.0 priority bounds.
Sitemap Validation: [XML Parsing] -> Schema Compliance (W3C Datetime, Priority Bounds, Max 50k URLs)Worked Example: Validate Production Sitemap
Check https://auditoptima.com/sitemap.xml for SEO indexing compliance.
url:https://auditoptima.com/sitemap.xml
Expected Output123 Total URLs, 123 Valid, 0 Errors, 0 Warnings, Status: Valid Protocol 0.9
Confirms absolute canonical URLs and valid W3C publication dates for search bots.
Technical Constraints & Limitations
- Private IP networks (127.0.0.1, 10.0.0.0/8, 192.168.0.0/16, etc.) are restricted by SSRF protection.
- Validates syntactic compliance and XML structure; does not execute individual HTTP GET requests for every listed URL.
Frequently Asked Questions
What is the maximum file size and URL limit for a sitemap?
Standard XML sitemaps are limited to 50,000 URLs and an uncompressed file size of 50MB. If your website has more pages, use a <sitemapindex> file to reference multiple sub-sitemaps.
Why does Google require W3C datetime format for lastmod?
Search engine crawlers use the <lastmod> tag to prioritize re-crawling updated pages. Non-standard date formats confuse crawlers and may lead to bots ignoring update signals.
Are priority and changefreq strictly enforced by search engines?
Google currently relies primarily on the actual content and <lastmod> date rather than <changefreq> and <priority>, but other search engines (like Bing and Yandex) still utilize these hints.