CASE STUDY · ALLBIRDS
23% lift in mobile conversion, shipped in 30 days.
Allbirds runs a heavy mobile catalog — wool runners photographed in macro, on lifestyle backgrounds, across 6 PDP templates. Their median product page tipped 4.8MB and Lighthouse Performance hovered in the 50s. Growth saw the conversion delta in their own dashboards; engineering owned the backlog.
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01
The challenge
PDP LCP was 5.8s on mid-tier Android, mobile bounce rate above 58%, organic traffic throttled by Core Web Vitals. The team couldn't ship a per-device image pipeline in-house without a quarter of platform engineering.
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02
The intervention
One-click Next.js + Shopify integration. Pixlog's per-device format selection (AVIF, WebP, JPEG XL) ran in front of every product photo. 4.1B-image model retrained compression on wool textiles, denim and lifestyle backgrounds without visible quality loss.
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03
The outcome
Median image payload down 73%. Lighthouse Performance from 52 to 98. Mobile conversion lifted 23% within 30 days. Zero code changes from Allbirds engineering post-install.
4.8MB → 1.3MBmedian page weight
52 → 98Lighthouse mobile
+23%mobile conversion
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