Free SEO Tools
Mobile SEO Checker
Enter a URL to check technical mobile signals in its HTML and CSS — viewport, fixed widths, oversized images, and more.
About this tool
This inspects a page's raw HTML and CSS for well-known technical mobile-friendliness signals. It is not Google's official Mobile-Friendly Test — it doesn't render the page or simulate a real mobile device, so treat results as a technical starting point, not a certification.
Frequently Asked Questions
- Is this the same as Google's Mobile-Friendly Test?
- No — this checks technical HTML/CSS signals only and doesn't render the page or simulate a real device.
- What signals does it check?
- Viewport meta tag, fixed-width elements, oversized images, small font sizes, and Flash content.
- Why does the viewport meta tag matter?
- It tells mobile browsers how to scale the page; without it, pages often render at desktop width and appear zoomed out.