OomTools

Mobile Viewport Tag Checker

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.

  • 100% free
  • Private & safe
  • Runs in your browser

Why use Mobile Viewport Tag Checker?

Mobile Viewport Tag Checker helps you optimise and publish with confidence, producing clean, standards-friendly output you can paste straight into your site.

  • Runs instantly in your browser — nothing to install, nothing uploaded.
  • Completely free, with no account, no watermarks and no usage limits.
  • Checks pasted HTML for the viewport meta tag
  • Paste your page HTML.
  • Works on any device — desktop, tablet and phone — and is fully keyboard accessible.

How to use Mobile Viewport Tag Checker

  1. Paste your page HTML.
  2. The viewport meta tag is detected.
  3. See whether it's mobile-friendly.
  4. Add or fix the tag as advised.

Examples

  • Confirming a template is mobile-ready.
  • Debugging why a page zooms out on phones.

Supported formats & limits

  • Checks pasted HTML for the viewport meta tag

Limitations

  • Checks pasted HTML only; it doesn't fetch live URLs.

Frequently asked questions

What's the ideal tag?

width=device-width, initial-scale=1.

Does it fetch my URL?

No — paste the HTML yourself.

Uploaded?

No — local only.

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