Viewport & Mobile Meta Checker
Verify width=device-width, initial-scale=1, lang attributes, and charset declarations before you ship any new page.
Run your first scan to confirm viewport, language, and charset tags.
Why viewport meta tags matter
The viewport tag tells browsers how to scale your layout on phones and tablets. Without width=device-width and initial-scale=1, even the best design renders zoomed-out and unreadable.
Responsive readiness in seconds
Paste your URL and we’ll show the live viewport tag, html lang attribute, and charset declaration. Patch anything missing before you release another landing page or localized experience.
Responsive essentials
- width=device-width — Match the layout width to the device width.
- initial-scale=1 — Set the default zoom level for crisp typography.
- user-scalable — Allow pinch-zoom where accessibility requires it.
International hygiene
- lang attribute — Signal the correct language to search engines and screen readers.
- UTF-8 charset — Prevent encoding issues for translated content.
- theme color — Optional but useful to brand mobile browser UI.
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Everything you need toship mobile-ready
Answers to the most common viewport, lang, and charset questions.
It controls how a page scales on mobile devices. width=device-width and initial-scale=1 ensure your layout fills the screen without forcing users to zoom.
Run this checker. It fetches the live head markup and shows the exact viewport tag so you can confirm all required directives are present.
Setting lang on the <html> element helps search engines deliver the correct locale and improves screen reader pronunciation.
Yes—declaring UTF-8 (or your chosen encoding) prevents browsers from guessing, which can otherwise garble characters.
As long as the URL is accessible without authentication, you can inspect staging or preview builds before shipping.
No. Each scan is rendered in your browser and discarded immediately.
Pages without correct viewport tags fail mobile-friendly tests, which can lead to lower rankings on mobile search.
Pair this meta audit with Core Web Vitals monitoring and device testing to ensure layouts, fonts, and tap targets feel great.
Check whenever you create new templates, roll out localized content, or migrate to new frameworks.
Add `<meta name="viewport" content="width=device-width, initial-scale=1" />` to your head. The tool will confirm once it appears.