# Sitemap XML Validator

> Open any sitemap XML URL in Firefox and this add-on detects it automatically — or paste a URL manually. Validates XML structure, checks every \<loc\> URL for HTTP status, and exports a full CSV report. No account required.

Canonical page: [https://chrome-stats.com/d/sitemap-xml-validator](https://chrome-stats.com/d/sitemap-xml-validator)

## Overview

- **ID:** `sitemap-xml-validator`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Rajiv
- **Category:** web-development,search-tools
- **Daily users:** 1
- **Version:** 2.0.0
- **Last updated:** 2026-04-22
- **First published:** 2026-04-19
- **Size:** 18 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/sitemap-xml-validator/)
- **Website:** [https://www.linkedin.com/in/rajiv-khanduja/](https://www.linkedin.com/in/rajiv-khanduja/)

## Description

Sitemap XML Validator gives developers, SEO teams, and QA engineers a fast,
no-setup way to audit any XML sitemap directly from the Firefox toolbar.

HOW IT WORKS

Browse to a sitemap XML URL and click the toolbar icon — the add-on detects the
page automatically and shows a one-click Validate button for the current tab URL.
Alternatively, paste any sitemap URL into the input field to audit it without
navigating there first.

XML STRUCTURE VALIDATION

The add-on parses the sitemap against the <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/358c3cc2a9bdab43d909ea7fe664d5c322b9f97735e240fb7f9b2b57e3564876/http%3A//Sitemaps.org" rel="nofollow">Sitemaps.org</a> protocol and reports:
  - Invalid root element (must be &lt;urlset&gt; or &lt;sitemapindex&gt;)
  - Missing or incorrect xmlns namespace declaration
  - Empty &lt;loc&gt; entries
  - Malformed URL formats inside &lt;loc&gt;
  - Incorrect &lt;lastmod&gt; date format (must follow W3C datetime)
  - Invalid &lt;changefreq&gt; values (must be one of the 7 accepted values)
  - Out-of-range &lt;priority&gt; numbers (must be 0.0 to 1.0)
Each issue is tagged with its entry number for fast debugging.

URL REACHABILITY CHECKS

Every &lt;loc&gt; URL is fetched concurrently (8 at a time) and classified:
  - Working (2xx)    - URL is reachable and returns a success response
  - Redirect (3xx)   - URL redirects to another location
  - Not Found (404)  - URL does not exist
  - Client Error (4xx) - Other client-side HTTP error
  - Server Error (5xx) - Server returned an error response
  - Timeout          -

🙌 Acknowledgement

Special thanks to Rajat Singh for the idea and inspiration.
LinkedIn: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/fec0d3f88dd7dda4078a0f59c4e968934490bebfd4c0cc72700c5bb746f09cfc/https%3A//www.linkedin.com/in/rajat-singh-20260518a/" rel="nofollow">https://www.linkedin.com/in/rajat-singh-20260518a/</a>

## Rankings

- #110,161 — Overall
- #235 — google maps scraper

## Permissions and access

### Permissions

- `activeTab`
- `tabs`
- `storage`

### Host permissions

- `<all_urls>`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension website URL may be invalid

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Similar extensions and apps

- [Sitemap Explorer: Check and View XML Sitemaps](https://chrome-stats.com/d/sitemap-explorer) — 317 users, 5.00 / 5
- [Sitemap Checker](https://chrome-stats.com/d/sitemap-checker) — 1 users, 5.00 / 5
- [SEO All](https://chrome-stats.com/d/seo-all) — 1 users
- [Rich Results & Schema Tester](https://chrome-stats.com/d/rich-results-schema-tester) — 18 users
- [SEOMeter – Complete SEO Audit Toolkit](https://chrome-stats.com/d/seometer) — 1 users, 5.00 / 5
- [SEO Inspector](https://chrome-stats.com/d/seo-inspector-extension-add-on) — 2 users
- [SEOInfo](https://chrome-stats.com/d/seoinfo) — 252 users, 4.36 / 5
- [CSS Validation Checker](https://chrome-stats.com/d/css-validation-checker) — 6 users
- [SEO Analyzer Tools](https://chrome-stats.com/d/seo-analyzer-tools) — 9 users
- [Schema Markup Validator](https://chrome-stats.com/d/schema-markup-validator) — 25 users
- [Sprout SEO Extension 🌱](https://chrome-stats.com/d/sprout-seo-extension) — 74 users, 5.00 / 5
- [Backlinks Checker](https://chrome-stats.com/d/backlinks-checker) — 2 users, 2.00 / 5

---

Source: [Chrome-Stats](https://chrome-stats.com/d/sitemap-xml-validator)