Flutter Web in Production — SEO, Core Web Vitals, and PWA at Scale Flutter Web has evolved well beyond "Flutter running in a browser." It now meets serious web requirements: SEO, Core Web Vitals, and full PWA support. This post covers production-grade techniques from a real live app. Choosing a Rendering Mode Flutter Web ships with multiple rendering backends. # flutter build web --web-renderer canvaskit (default) # flutter build web --web-renderer html (legacy) # flutter build web --wasm (WebAssembly / Dart 3.4+) Enter fullscreen mode Exit fullscreen mode Mode Render Quality Initial Load SEO Best For CanvasKit ★★★ Heavy (~2 MB) ❌ Graphics-heavy apps HTML ★★ Light △ Content-first sites Wasm ★★★★ Medium ❌ High-performance apps SEO: Meta Tags and Structured Data Manage dynamic meta tags in web/index.html : <!DOCTYPE html> <html> <head> <meta charset= "UTF-8" > <meta name= "viewport" content= "width=device-width, initial-scale=1.0" > <!-- OGP / Twitter Card --> <meta…
