Kernvel Seasonal Effects

Kernvel Seasonal Effects adds snow, falling leaves, confetti, and 30+ seasonal effects to your Shopify storefront without slowing it down. Everything renders in a single lightweight canvas overlay with zero layout shift, so your Christmas snow or Black Friday confetti won't hurt your Core Web Vitals score. Set it once and let it run automatically. Schedule any effect to turn on and off for holidays, sales, or promotions. Choose exactly where effects appear—homepage, product pages, or storewide—with separate mobile controls. Pick from 12 one-tap seasonal presets or customize density, speed, size, and drift to match your brand. Works on any theme with no server calls and no performance impact.