Shipping a production-ready Flutter Web app requires going beyond default settings. This guide covers renderer selection, deferred imports, image optimization, profiling, and build-time optimizations — all with practical code examples. 1. CanvasKit vs HTML Renderer Flutter Web ships two renderers. Picking the right one is the highest-leverage decision you can make. Aspect CanvasKit HTML Rendering quality High (Skia) Medium (CSS/SVG) Initial bundle size +~1.5 MB Smaller Animation smoothness Excellent Limited Text rendering Consistent OS font dependent SEO friendliness Hard Easier # Development — specify renderer flutter run -d chrome --web-renderer canvaskit flutter run -d chrome --web-renderer html # Production builds flutter build web --web-renderer canvaskit --release flutter build web --web-renderer html --release # auto: CanvasKit on desktop, HTML on mobile flutter build web --web-renderer auto --release # WASM compilation (Flutter 3.24+, experimental) flutter build web --wasm --release Enter fullscreen…