Converter · SOTA sitemaps.org 0.9 + hreflang

Sitemap Validator & Analyzer

Validate XML sitemaps against sitemaps.org 0.9 spec, check hreflang consistency (RFC 8288), size limits (50MB / 50,000 URLs), duplicate loc detection, and last-mod freshness.

Paste XML Fetch URL

Sitemap XML

Summary

Issues

URL sample (first 50)

How to Use Sitemap Validator in 3 Steps

Configure. Paste sitemap XML directly, drop a .xml or .xml.gz file, or enter a sitemap URL. The validator auto-decompresses gzip.
Process. Review the summary: URL count, total size, compressed size, hreflang groups, and lastmod distribution.
Export. Fix issues from the list: XSD violations, missing hreflang back-references, duplicate loc tags, bad dates, over-50k URLs, or over-50MB files.

Why Sitemap Validator on Pixlane

A valid sitemap is how search engines efficiently crawl a site. Errors like missing hreflang back-references, oversized files (>50MB uncompressed), or duplicate URLs silently harm indexing. Pixlane parses your sitemap client-side with the browser's native DOMParser, validates against sitemaps.org 0.9 + hreflang policy, and surfaces issues with exact line numbers.

sitemaps.org 0.9 + Index: Validates both urlset (classic sitemap) and sitemapindex (sitemap of sitemaps) against the XSD. Catches structural and field-level issues.
Hreflang Consistency: Detects missing back-references, if en-us links to tr-tr, tr-tr must also link back to en-us (RFC 8288 + Google policy). Most validators miss this.
50k / 50MB Limits: Flags sitemaps exceeding the 50,000 URL or 50 MB uncompressed limit, Google silently drops oversized sitemaps without warning.
Duplicate Detection: Finds duplicate <loc> entries and duplicate hreflang+url pairs, common on multilingual sites with template bugs.

Frequently Asked Questions

What counts as a valid sitemap?

One that follows sitemaps.org 0.9: urlset root element with xmlns, each <url> containing a <loc>, optional <lastmod>, <changefreq>, <priority>, and optional xhtml:link hreflang alternates. File size ≤50MB uncompressed, ≤50,000 URLs.

What is hreflang consistency?

Google requires bi-directional hreflang: if URL A declares hreflang to URL B, URL B must declare hreflang back to A. Broken back-references cause hreflang to be ignored, hurting international SEO.

Is my sitemap sent to a server?

No. The validator parses everything in your browser using DOMParser. URL fetching uses your browser's cache and CORS. Sitemaps on your own domain usually work without extra setup.

Is this tool free?

Yes. Sitemap Validator on Pixlane currently requires no signup for core use; tool-specific limits may apply.

Home File Converter Tools

Related tools

Robots.txt Tester: Test robots.txt rules for Googlebot, Bingbot, AI search crawlers, user-triggered agents, training crawlers, and custom user-agent product tokens with RFC 9309 matching.
Schema / JSON-LD Validator: Validate JSON-LD and microdata against Schema.org 28 (2024). Rich Results eligibility checks for Article, Product, FAQ, HowTo, VideoObject, Recipe, Event, and 20+ types.
Meta Tag Analyzer: Analyze meta tags, Open Graph, Twitter Card, canonical, hreflang, and robots directives. Title/description length checks, duplicate detection, and Core Web Vitals meta flags.
Open Graph Preview: Preview how any URL looks when shared on 8 platforms: Facebook, Twitter/X, LinkedIn, Discord, Slack, WhatsApp, iMessage, Telegram. Live OG + Twitter Card rendering.
XML Formatter: Format, validate, and minify XML with namespace-aware parsing, CDATA preservation, and XPath queries. Uses DOMParser for robust XML 1.0 compliance.
ICO Generator: Generate ICO files online for favicons, desktop shortcuts, web app icons, browser tabs, and Windows-compatible icon packaging.
Image to Base64: Convert images to Base64 online for inline embeds, CSS or HTML data URIs, API payloads, testing, and browser-based asset workflows.
Base64 to Image: Convert Base64 strings to image files online for debugging, downloads, inline asset recovery, and browser-based development workflows.