Free Tool
Mobile Viewport Checker
Detect viewport meta tags and confirm your site renders correctly on mobile devices.
Responsive check
Layout safety
Instant scan
Viewport Meta Tag
Checks for presence and proper configuration of viewport meta tag.
Width & Scale
Verifies device-width and initial-scale settings.
Accessibility
Warns about zoom restrictions that hurt accessibility.
Why Viewport Matters
Without a proper viewport tag, mobile browsers render pages at desktop width and scale down, making text unreadable and buttons hard to tap.
60%+Mobile traffic
CoreWeb Vital
UXCritical factor
Frequently Asked Questions
What is the ideal viewport tag?
width=device-width, initial-scale=1 is the recommended standard for responsive sites.
Should I disable zoom?
No. Disabling zoom (user-scalable=no) hurts accessibility and may violate WCAG guidelines.