Mobile Snapshot Test
The Mobile Screenshot Tool fetches any URL with a mobile user-agent at a 375 x 667 viewport (iPhone-equivalent) and renders a real screenshot of the page exactly as a mobile visitor — and Googlebot Mobile — sees it. Because Google has fully switched to mobile-first indexing, the mobile rendering of your page is the primary version Google ranks. Layout breaks, hidden content or render-blocking issues that look fine on desktop can silently demote rankings until you literally see the mobile view.
What This Tool Checks
- Mobile rendering at 375 x 667 px (iPhone-equivalent)
- Above-the-fold visibility (hero, headline, CTA)
- Horizontal scroll detection (content wider than viewport)
- Tap target spacing and font size legibility
- Mobile-only popups / interstitials that may trigger penalties
- Differences between desktop and mobile content
- Network and rendering errors at the mobile viewport
Why It Matters for SEO
Google has used mobile-first indexing across the entire web since 2023 — meaning the mobile rendering is the version Google crawls, scores and ranks. If your mobile layout hides content the desktop version shows, that content effectively does not exist for SEO. Intrusive mobile interstitials carry a direct ranking penalty. Pages where the mobile view is broken or shows less content rank below pages that look identical on both devices.
How to Fix It
Use responsive design with a single HTML output rendered differently via CSS — never serve fundamentally different content per device. Test every important page at the 375px viewport and fix layout breaks. Remove or shrink intrusive interstitials that block more than the bottom 15% of the screen.
How It Works
We launch a headless Chrome instance configured with a mobile user-agent (iPhone), set the viewport to 375 x 667, navigate to the URL, wait for layout to stabilise, then capture a full-page screenshot. The resulting image plus rendered HTML lets you spot layout issues, missing assets and intrusive interstitials immediately.
Common Mistakes to Avoid
- Hidden mobile navigation that hides important content from Googlebot
- Mobile-only intrusive interstitials triggering Google's penalty
- Horizontal scroll caused by an element wider than 100vw
- Font sizes below 16px that fail mobile usability checks
- Mobile layout served via JavaScript that Googlebot fails to execute
Quick Checklist
- Mobile and desktop show the same content
- No horizontal scroll at 375px viewport
- Body font size at least 16px
- Tap targets at least 48 x 48 px with adequate spacing
- No intrusive interstitials covering main content