Free XML Sitemap Validator · Check Errors & Validate URLs Online · Nuxt SEO

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[Nuxt SEO on GitHub](https://github.com/harlan-zw/nuxt-seo)

$ nuxt-seo tools

# Free XML Sitemap Validator

Validate XML sitemaps with sitemap index support. Check for errors, detect duplicates, verify Google compliance, and export results as CSV.

URL

Paste XML

Validate

Try:nuxt.com

vuejs.org

github.blog

## What is an XML Sitemap?

An XML sitemap is a file that lists all the important URLs on your website, helping search engines discover, crawl, and index your pages efficiently. Think of it as a roadmap for Google, Bing, and other crawlers.

### Discovery

Helps search engines find pages that might not be discovered through internal linking alone.

### Freshness

The `lastmod` date tells crawlers when content was last updated, prioritizing fresh content.

### Organization

Large sites use sitemap indexes to organize URLs into logical groups (blog, products, pages).

## Sitemap Validation Checklist

1File is accessible at /sitemap.xml or declared in robots.txt

2XML is well-formed with proper namespace declaration

3All URLs use absolute paths (https://example.com/page)

4File is under 50MB uncompressed and 50,000 URLs

5lastmod dates use W3C format (YYYY-MM-DD)

6No duplicate URLs in the same sitemap

7No URLs blocked by robots.txt Disallow rules

8URLs return 200 status codes (not 404, 301, or 500)

9Sitemap is submitted to Google Search Console

Use this validator to check items 2-6 automatically. For items 7-8, check your [robots.txt](https://nuxtseo.com/tools/robots-txt-validator) and monitor [Google Search Console](https://search.google.com/search-console).

## What Makes a Valid Sitemap?

XML sitemaps help search engines discover and crawl your pages efficiently. A valid sitemap follows specific rules:

- **Proper namespace:** Must include xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
- **Size limits:** Maximum 50,000 URLs and 50MB uncompressed
- **Valid URLs:** Absolute URLs with proper encoding
- **Date format:** W3C datetime format (YYYY-MM-DD)

## Common Sitemap Errors

### `Invalid XML`

Missing closing tags, incorrect nesting, or unescaped characters (&, <, >).

### `Wrong date`

Using formats like "01/15/2024" instead of "2024-01-15".

### `Relative URLs`

Using "/page" instead of "https://example.com/page".

### `Too large`

Over 50,000 URLs or 50MB file size. Use sitemap index for large sites.

## Generate Sitemaps Automatically

Stop maintaining sitemaps manually. Use a module to generate them automatically from your routes.

### Nuxt

Auto-generate sitemaps from your pages, supports dynamic routes, i18n, and sitemap indexes.

[Nuxt Sitemap Guide ](https://nuxtseo.com/learn-seo/nuxt/controlling-crawlers/sitemaps)

### Vue / Vite

Generate sitemaps at build time from your Vue Router configuration.

[Vue Sitemap Guide ](https://nuxtseo.com/learn-seo/vue/controlling-crawlers/sitemaps)

## Frequently Asked Questions

<details>

<summary>01 ### What is a sitemap validator?

</summary>

A sitemap validator is a tool that checks your XML sitemap for errors, validates URL format, and ensures compliance with the sitemaps.org protocol. It helps ensure search engines can properly crawl and index your website.

</details>

<details>

<summary>02 ### How do I check my sitemap for errors?

</summary>

Enter your sitemap URL (e.g., example.com/sitemap.xml) above and click Validate. This sitemap checker will fetch your sitemap, parse all URLs, and validate against Google's sitemap requirements including lastmod dates, changefreq, and priority values.

</details>

<details>

<summary>03 ### What is changefreq in a sitemap?

</summary>

Changefreq (change frequency) is an optional XML sitemap tag that tells search engines how often a page is likely to change. Values include always, hourly, daily, weekly, monthly, yearly, and never. Note: Google largely ignores this tag and relies on actual crawl data instead.

</details>

<details>

<summary>04 ### What is a sitemap index?

</summary>

A sitemap index is a file that references multiple sitemaps. It's used when your site has more than 50,000 URLs or your sitemap exceeds 50MB. Each sitemap in the index can contain up to 50,000 URLs.

</details>

<details>

<summary>05 ### How do I validate my sitemap for Google?

</summary>

Use this sitemap tester to validate your sitemap structure, then submit it to Google Search Console. Google will show any crawl errors. Ensure your sitemap uses absolute URLs, valid lastmod dates (YYYY-MM-DD), and doesn't exceed size limits.

</details>

Part of [Nuxt SEO](https://nuxtseo.com/) — the all-in-one technical SEO toolkit for Nuxt. Sitemaps, robots.txt, meta tags, Schema.org, and OG images in one install.

[2026 SEO Checklist for Nuxt & Vue Sitemap looking good? Make sure the rest of your SEO is covered too.](https://nuxtseo.com/learn-seo/checklist)

### References

[Sitemaps Protocol Official specification for XML sitemaps.](https://www.sitemaps.org/protocol.html) [Google: Build a Sitemap Google's guide to creating sitemaps.](https://developers.google.com/search/docs/crawling-indexing/sitemaps/build-sitemap) [Google Search Console Submit and monitor your sitemap.](https://search.google.com/search-console)

### Related

[Sitemap Module](https://nuxtseo.com/docs/sitemap/getting-started/introduction) [Robots.txt Generator](https://nuxtseo.com/tools/robots-txt-generator) [Robots.txt Validator](https://nuxtseo.com/tools/robots-txt-validator) [Meta Tag Checker](https://nuxtseo.com/tools/meta-tag-checker) [Schema Validator](https://nuxtseo.com/tools/schema-validator)

[GitHub](https://github.com/harlan-zw/nuxt-seo) [ Discord](https://discord.com/invite/275MBUBvgP)

### [NuxtSEO](https://nuxtseo.com/ "Home")

- [Getting Started](https://nuxtseo.com/docs/nuxt-seo/getting-started/introduction)
- [MCP](https://nuxtseo.com/docs/nuxt-seo/guides/mcp)

Modules

- [Robots](https://nuxtseo.com/docs/robots/getting-started/introduction)
- [Sitemap](https://nuxtseo.com/docs/sitemap/getting-started/introduction)
- [OG Image](https://nuxtseo.com/docs/og-image/getting-started/introduction)
- [Schema.org](https://nuxtseo.com/docs/schema-org/getting-started/introduction)
- [Link Checker](https://nuxtseo.com/docs/link-checker/getting-started/introduction)
- [SEO Utils](https://nuxtseo.com/docs/seo-utils/getting-started/introduction)
- [Site Config](https://nuxtseo.com/docs/site-config/getting-started/introduction)
- [Skew Protection](https://nuxtseo.com/docs/skew-protection/getting-started/introduction)
- [AI Ready](https://nuxtseo.com/docs/ai-ready/getting-started/introduction)

### [NuxtSEO Pro](https://nuxtseo.com/pro "Home")

- [Getting Started](https://nuxtseo.com/pro)
- [Dashboard](https://nuxtseo.com/pro/dashboard)
- [Pro MCP](https://nuxtseo.com/docs/nuxt-seo-pro/mcp/installation)

### [Learn SEO](https://nuxtseo.com/learn-seo "Learn SEO")

Nuxt

- [Mastering Meta](https://nuxtseo.com/learn-seo/nuxt/mastering-meta)
- [Controlling Crawlers](https://nuxtseo.com/learn-seo/nuxt/controlling-crawlers)
- [Launch & Listen](https://nuxtseo.com/learn-seo/nuxt/launch-and-listen)
- [Routes & Rendering](https://nuxtseo.com/learn-seo/nuxt/routes-and-rendering)
- [Staying Secure](https://nuxtseo.com/learn-seo/nuxt/routes-and-rendering/security)

Vue

- [Vue SEO Guide](https://nuxtseo.com/learn-seo/vue)
- [Mastering Meta](https://nuxtseo.com/learn-seo/vue/mastering-meta)
- [Controlling Crawlers](https://nuxtseo.com/learn-seo/vue/controlling-crawlers)
- [SPA SEO](https://nuxtseo.com/learn-seo/vue/spa)
- [SSR Frameworks](https://nuxtseo.com/learn-seo/vue/ssr-frameworks)
- [SEO Checklist](https://nuxtseo.com/learn-seo/checklist)
- [Pre-Launch Warmup](https://nuxtseo.com/learn-seo/pre-launch-warmup)
- [Backlinks & Authority](https://nuxtseo.com/learn-seo/backlinks)

### [Tools](https://nuxtseo.com/tools "SEO Tools")

- [Social Share Debugger](https://nuxtseo.com/tools/social-share-debugger)
- [Robots.txt Generator](https://nuxtseo.com/tools/robots-txt-generator)
- [Meta Tag Checker](https://nuxtseo.com/tools/meta-tag-checker)
- [HTML to Markdown](https://nuxtseo.com/tools/html-to-markdown)
- [XML Sitemap Validator](https://nuxtseo.com/tools/xml-sitemap-validator)
- [Schema.org Validator](https://nuxtseo.com/tools/schema-validator)
- [Keyword Research Pro](https://nuxtseo.com/tools/keyword-research)
- [SERP Analyzer Pro](https://nuxtseo.com/tools/serp-analyzer)
- [Domain Rankings Pro](https://nuxtseo.com/tools/domain-rankings)

Copyright © 2023-2026 Harlan Wilton - [MIT License](https://github.com/harlan-zw/nuxt-seo/blob/main/license) · [mdream](https://mdream.dev)