I built a Chrome Extension to validate sitemap.xml in one click — here's why and how

#showdev #webdev #extensions

The itch I had to scratch

Every time I ran a technical SEO audit, I'd end up doing the same manual dance: copy the sitemap URL, paste it into an online validator, wait, get back a wall of output, squint at it.

It felt like a solved problem that hadn't actually been solved for people who live in the browser.

So I built Sitemap XML Validator — a Chrome Extension that validates your sitemap.xml right inside Chrome, for free.

What it does

Parses any sitemap.xml URL you open in Chrome
Detects malformed XML, missing tags, and structural errors
Returns results instantly inside the extension panel
No account, no upload, no waiting

Who it's for

Devs doing pre-launch QA
SEO professionals running technical audits
Anyone managing a site with a sitemap

The technical side (quick overview)

The extension reads the active tab's URL, fetches the sitemap content, and runs an XML parse + validation pass. Errors and warnings are categorised and surfaced in a clean summary view.

It's intentionally lightweight — no background tracking, no data sent anywhere, no bloat.

Try it

It's live on the Chrome Web Store now, completely free.

Would love feedback from the dev community — especially if you've built anything similar or have thoughts on what other checks would be useful. Drop a comment!

Built as a side project. All feedback welcome.