Paste your page's HTML (or just the head) to check whether it has a proper mobile viewport meta tag — a must for responsive, mobile-friendly pages. It flags a missing or non-standard tag. Runs in your browser.
Mobile Viewport Tag Checker helps you optimise and publish with confidence, producing clean, standards-friendly output you can paste straight into your site.
width=device-width, initial-scale=1.
No — paste the HTML yourself.
No — local only.