Flutter Web Rendering Complete Guide — CanvasKit vs HTML Renderer

Flutter Web supports two renderers. Understanding CanvasKit vs HTML renderer helps you pick the right one for your app.

Two Renderers

HTML Renderer

How it works : HTML / CSS / Canvas 2D API

Bundle size : Small (~1MB)

Initial load : Fast

Fidelity : May differ slightly from Flutter desktop

Best for : Text-heavy, document-style apps

CanvasKit Renderer

How it works : Skia compiled to WebAssembly

Bundle size : Large (~4MB with Skia WASM)

Initial load : Slower (WASM download required)

Fidelity : Pixel-perfect match with native

Best for : Graphics-heavy apps, games, custom drawing

Switching Renderers

# Build with HTML renderer flutter build web --web-renderer html

# Build with CanvasKit flutter build web --web-renderer canvaskit

# Auto (default): mobile → HTML / desktop → CanvasKit flutter build web --web-renderer auto

# Dev server flutter run -d chrome --web-renderer canvaskit

Enter fullscreen mode

Exit fullscreen mode

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