XML Sitemap Validator & Checker — Broken Link Finder

Stop guessing which sitemap URLs are broken. XML Sitemap Validator & Checker is a free sitemap checker that validates any XML sitemap against the official Sitemaps protocol and live-tests every URL for broken links, 404 errors, and redirects — all from your browser toolbar. Open a sitemap in any tab and the extension auto-detects it instantly. Or paste any sitemap URL and run a complete sitemap audit in seconds. No account, no signup, no external servers. ============================ WHY YOU NEED A SITEMAP VALIDATOR ============================ Your XML sitemap tells Google, Bing, and other search engines exactly which pages to crawl and index. A single malformed tag, an invalid lastmod date, or a batch of 404 URLs can quietly damage your crawlability and waste your crawl budget. Google Search Console will tell you a sitemap "couldn't fetch" or has errors — but it rarely tells you exactly which entry is broken or why. This extension answers that in one click: -- Is my sitemap valid XML? -- Does it follow the Sitemaps protocol correctly? -- Which URLs in my sitemap return 404, 500, or redirect somewhere else? -- Which entries are empty, malformed, or out of spec? ______________________________ WHAT IT VALIDATES _____________________________ XML STRUCTURE -- Root element and required namespace verification -- Malformed, unclosed, or misplaced tags -- Empty or malformed <loc> entries flagged individually by entry number SITEMAPS PROTOCOL FIELDS -- lastmod — valid W3C date format detection -- changefreq — valid enum values (always, hourly, daily, weekly, monthly, yearly, never) -- priority — valid range check (0.0 to 1.0) LIVE URL STATUS CHECKING -- Every URL is tested with a real HTTP request -- 200 OK — healthy pages confirmed -- 301 / 302 — redirected URLs that should be updated in your sitemap -- 404 Not Found — broken links that waste crawl budget and hurt SEO -- 500 server errors and timeouts — pages search engines cannot reach ____________________________ WHAT YOU GET ____________________________ -- AUTO-DETECTION — browse to any .xml sitemap page and the extension recognizes it automatically. No copy-pasting needed. -- MANUAL MODE — paste any sitemap URL to audit any website, including client sites and competitor sitemaps. -- BULK URL CHECKER — 8 concurrent requests with a real-time progress bar. Check hundreds of URLs in minutes, not hours. -- CLEAR RESULTS TABLE — every URL listed with its HTTP status code and a plain-English category label (OK, Redirect, Broken, Server Error, Timeout). -- ONE-CLICK CSV EXPORT — download the full report for spreadsheets, client deliverables, or further analysis in Excel or Google Sheets. -- 100% PRIVATE — no account required, no tracking, no analytics, no external servers. All validation runs locally in your browser. -- LIGHTWEIGHT — tiny footprint, no background bloat, works instantly. ============================ WHO IT'S FOR ============================ SEO PROFESSIONALS Run technical SEO audits and crawlability checks without firing up a desktop crawler. Verify a client's sitemap health in seconds during an audit call. Perfect companion for fixing sitemap errors reported by Google Search Console. WEB DEVELOPERS Test sitemaps before deployment. Verify your CMS, static site generator, or framework (WordPress, Shopify, Next.js, Astro, Hugo, and more) is producing valid sitemap output after every release. QA ENGINEERS Add sitemap validation to your pre-release checklist. Catch broken URLs and structure regressions before they ship to production. SITE OWNERS AND MARKETERS Find broken links in your sitemap and fix indexing issues without paying for enterprise SEO tools. If your pages aren't getting indexed, a broken sitemap is one of the first things to rule out. AGENCIES AND FREELANCERS Audit prospect and client sitemaps instantly, export the CSV, and attach it to your technical SEO report. ____________________________________ HOW IT WORKS ___________________________________ 1. Open any XML sitemap URL in Chrome — the extension detects it automatically 2. Click the toolbar icon and hit Validate 3. The extension parses the XML, validates structure and field values, then checks every URL's live HTTP status with a real-time progress bar 4. Review the results table — every broken link, redirect, and error clearly labeled 5. Export the complete report to CSV with one click ============================ COMMON USE CASES ============================ -- Check a sitemap for broken links before submitting it to Google Search Console -- Diagnose "Couldn't fetch" and sitemap parse errors from Search Console -- Validate sitemap XML structure after a site migration or redesign -- Find 404 pages and redirect chains hiding in your sitemap -- Verify lastmod dates are formatted correctly so search engines trust them -- Test a staging site's sitemap before launch -- Audit an entire client site's sitemap health during onboarding -- Confirm your sitemap plugin or generator is producing valid output -- Monitor sitemap quality after large content publishes or deletions ============================ FREQUENTLY ASKED QUESTIONS ============================ Q: Does it work with any website? A: Yes. Paste any public sitemap URL — your own site, a client site, or any site you want to analyze. Q: How is this different from online sitemap validators? A: Online tools require you to leave your workflow, often limit URL counts, and some upload your data to their servers. This extension runs entirely in your browser, auto-detects sitemaps as you browse, and exports results instantly. Q: Does it check every single URL? A: Yes. Every <loc> entry gets a live HTTP request, processed 8 at a time with a progress bar so you always know where the check stands. Q: Is my data private? A: Completely. Nothing is collected, tracked, or sent to any external server. All processing happens locally in your browser. Q: Is it really free? A: Yes — free, with no account, no trial …