#543 · Developer Tool

Sitemap XML Validator

Validate the structure and core values of an XML sitemap without uploading it. The checker accepts both urlset and sitemapindex documents, detects XML parser errors, counts entries, checks absolute HTTP(S) loc values, and reviews optional lastmod, changefreq, and priority fields. Duplicate locations and mixed hostnames are reported as practical warnings. The check focuses on the standard sitemap vocabulary and keeps the original document on your device.

Developer Input

Web metadata input
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How to use this developer tool

  1. Paste the requested source text or load a local file.
  2. Set any comparison values or processing options shown below the input.
  3. Select the primary action or press Ctrl/Cmd + Enter.
  4. Review the diagnostics, then copy or download the output.

What this developer tool does

The output separates blocking XML or field errors from warnings that should be reviewed before submission.

The root must be urlset or sitemapindex. Every direct entry needs one loc; optional values are checked against their documented formats and ranges.

This structural test does not confirm that listed URLs return 200 responses or are indexable.

Example

Input

<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
  <url><loc>https://example.com/</loc><lastmod>2026-07-19</lastmod></url>
</urlset>

Run the sample to see the exact report and metrics produced by the current implementation.

Use cases

  • Pre-deployment review of generated site files
  • Debugging crawler or link-preview configuration
  • Auditing metadata during a migration
  • Creating repeatable QA evidence for a release

Tips for reliable output

  • Paste the complete source when grouping or document context matters.
  • Use absolute public URLs unless the field explicitly accepts a path.
  • Retest after redirects, route rules, or locale mappings change.
  • Keep a deliberately invalid sample for regression checks.
  • Confirm the deployed result with the relevant external platform.

Processing details

The root must be urlset or sitemapindex. Every direct entry needs one loc; optional values are checked against their documented formats and ranges. The parser runs entirely in the current browser tab and returns copy-ready text plus structured exports when useful.

This structural test does not confirm that listed URLs return 200 responses or are indexable.

Frequently asked questions

Can I use this tool without uploading data?

Yes. Processing happens in your browser, and the page makes no request with the supplied input.

What happens when the input is malformed?

The Sitemap XML Validator stops, displays an actionable error, and does not produce a misleading successful result.

Does the result guarantee search engine behavior?

No. The result checks the supplied markup or rules; crawlers and social platforms may apply additional policies and cached data.

Can I download the result?

Yes. Use Download for the primary output, or the CSV and JSON buttons when structured exports are available.

How should I test the result before deployment?

Run a representative valid sample and a deliberately invalid case, then verify the deployed public URL with the relevant crawler or platform tool.

Checks and output

AreaBehavior
InputProcessed locally
ErrorsReported without silent correction
ExportCopy, download, and structured data when available

Web Meta & Server Files

Inspect crawler directives, sitemap files, canonical URLs, localized alternates, and social metadata.

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