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.