Sitemap XML Validator
Validate XML sitemap syntax, urlset tags, and lastmod timestamps.
Meta Tag & Open Graph Generator
About Sitemap XML Validator
The XML Sitemap Syntax & Protocol Validator audits `sitemap.xml` and `sitemap_index.xml` files against Google and Sitemaps.org 0.9 schemas, verifying URL count limits (< 50,000), uncompressed file size (< 50MB), HTTPS protocols, and ISO 8601 `<lastmod>` timestamps.
How to Use Sitemap XML Validator
Step 1
Upload a `sitemap.xml` file or paste XML markup into the editor.
Step 2
Inspect the validation status badge (VALID / INVALID) and total URL count.
Step 3
Review any reported schema errors or invalid URL structures.
Step 4
Click "Copy Report".
Practical Use Cases for Sitemap XML Validator
Pre-Submission Google Search Console Verification
Audit your XML sitemaps before submitting them to Google Search Console and Bing Webmaster Tools to avoid crawl indexing errors.
Validating Sitemaps Index & Multi-File Architecture
Verify parent `sitemap_index.xml` files linking to multiple child sitemaps with correct `<sitemap>` and `<loc>` tags.
Input & Output Examples
Catching Invalid Lastmod Date in Sitemap
<url><loc>https://renderxd.com/</loc><lastmod>01-09-2026</lastmod></url>
Error at URL #1: `<lastmod>` date "01-09-2026" is not in valid W3C Datetime format (YYYY-MM-DD or YYYY-MM-DDThh:mm:ssTZD).
Key Features & Performance
- ✓Validates against official Sitemaps.org 0.9 XML schema.
- ✓Checks limit constraints: maximum 50,000 URLs and 50MB uncompressed file size.
- ✓Audits `<loc>`, `<lastmod>`, `<changefreq>`, and `<priority>` elements.
- ✓Supports image sitemaps (`image:image`), video sitemaps, and news sitemaps.
- ✓100% Client-Side validation.
- ✓1-Click Copy audit report.
Key Terminology & Definitions
Sitemaps.org 0.9 Protocol
The standard XML schema supported jointly by Google, Microsoft, and Yahoo for submitting website URLs for search engine indexing.
W3C Datetime (ISO 8601)
The required date format for `<lastmod>` tags (e.g. `2026-09-01` or `2026-09-01T10:00:00+00:00`).
