Responsive Viewport Check
Verify that the page declares viewport behavior required for usable mobile rendering.
Check your websiteWhy this check matters
Without an appropriate viewport declaration, mobile browsers can render a desktop-sized canvas and shrink it, making text and controls difficult to use.
Passing evidence
<meta name="viewport" content="width=device-width, initial-scale=1" />Common failing evidence
No viewport meta element detectedPossible false positives
- The meta tag does not guarantee that the CSS itself is responsive.
- Embedded documents may inherit sizing constraints from a parent context.
How to fix it safely
- Add the standard width and initial-scale viewport declaration.
- Remove fixed page widths that cause overflow.
- Test controls and typography across representative breakpoints.
How to verify the fix
- Inspect the rendered head for one viewport declaration.
- Exercise the page at narrow mobile widths without zooming.
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