Run a Free Mobile Landing Page Audit to Stop Wasted Ad Spend

The most common mobile conversion failure is structural: the primary call to action is positioned below a hero section, a headline, and a value proposition paragraph - none of which is the CTA. On a 375px viewport, this typically places the buy button or form submit below the first scroll. Visitors who don't scroll don't see the action they arrived to take. Meta, TikTok, and Instagram traffic arrive on mobile by default - this failure affects the majority of paid click volume.

Google's Web Vitals standard and Apple's Human Interface Guidelines both specify 44×44 CSS pixels as the minimum touch target. Elements below this size cause two distinct failures: accidental taps on adjacent elements, and missed taps that register as no-action. On ecommerce pages, size and color variant selectors - typically rendered at 32–38px in default Shopify themes - are the most frequent violators. Icon-only buttons (wishlist hearts, share icons, close modals) are a close second.

A page without `<meta name='viewport' content='width=device-width, initial-scale=1'>` renders at desktop width on mobile browsers - typically 980px - and then scales down to fit the screen. The result is an unzoomed desktop layout where all text is illegible, all tap targets are tiny, and CTAs require precision tapping. This is a foundational configuration error that makes every other mobile fix irrelevant until it is corrected.

Mobile form friction has two observable components. First: multi-field forms without `autocomplete` attributes force the visitor to type every field manually - name, email, company - on a touchscreen keyboard. Second: email inputs without `type='email'` do not trigger the email-optimized keyboard (with the @ symbol prominent) on iOS and Android. Both add friction that is invisible on desktop but material on mobile.

A 1400×900 hero image loaded on a 375px mobile viewport delivers 2–4x the bytes the device can render. On a median 4G connection, a single oversized hero image adds 1–3 seconds to LCP. Most pages do not use `srcset` or `sizes` attributes to serve mobile-appropriate image dimensions - the same asset served to desktop users is served to mobile visitors at full resolution.

iOS Safari auto-zooms into form inputs and interactive text elements when the font size is below 16px. This zoom behavior is a browser protection against illegible text - but it breaks the page layout for the visitor, requiring them to manually zoom out before continuing. Pages that set body text at 14px or 15px - common in design systems optimized for desktop - trigger this behavior on every form interaction on iOS.

What is the most common mobile conversion leak on landing pages?

The primary CTA not being visible on mobile without scrolling. The audit checks for this specifically: on a 375px viewport, is the primary call to action visible before the first scroll? If not, a significant portion of mobile visitors never see the action they are supposed to take.

What is the minimum tap target size for mobile buttons?

44×44 CSS pixels - Google's Web Vitals standard and Apple's HIG minimum. Buttons, links, and form controls below this size cause accidental taps on adjacent elements or failed interactions. Variant selectors, size pickers, and icon-only buttons on ecommerce pages are the most frequent offenders.

Does page load speed affect mobile conversion differently than desktop?

Yes. Mobile connections are slower and more variable than desktop. A page that loads in 1.2s on desktop may take 3.8s on a median 4G connection. Google's LCP threshold is 2.5s. Pages above that threshold see measurable conversion drop-off because mobile visitors are more likely to abandon on slow connections than desktop users.

How do I check if my landing page has mobile conversion problems without testing on a device?

Chrome DevTools device simulation covers most observable issues: CTA visibility at 375px, tap target size, viewport rendering, and image layout. For real device rendering, the audit fetches the page HTML and checks viewport meta configuration, image sizing signals, and font-size declarations in the source.

What is horizontal overflow and why does it hurt mobile conversion?

Horizontal overflow occurs when an element's width exceeds the viewport width, creating a horizontal scrollbar. It signals to the visitor that the page was not designed for their device. It also pushes CTAs out of the visible horizontal area on some layouts, making them unreachable without deliberate scrolling in two directions.